Science Dudes

Velocity vs Time Graph For Freely Falling Object

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1PXLupMjj1xnKdrNOSvai0RTCROKmFgrNgGypeBqDvt7YFAqEZ_a1SpSEOlX9VBC_EntLXYSqf1V0mfqMvnKNqLuzRi0nh3-7z4rjGAhaonSy21DxfLh5cTFvBeXMsIbLHF3y0apOoKI/s1600/Photo+Guide+To+Italy+iPhone+Facebook+Post.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Velocity vs Time Graph For Freely Falling object" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1PXLupMjj1xnKdrNOSvai0RTCROKmFgrNgGypeBqDvt7YFAqEZ_a1SpSEOlX9VBC_EntLXYSqf1V0mfqMvnKNqLuzRi0nh3-7z4rjGAhaonSy21DxfLh5cTFvBeXMsIbLHF3y0apOoKI/s320/Photo+Guide+To+Italy+iPhone+Facebook+Post.png" title="Velocity vs Time Graph For Freely Falling object" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: left;">
In free fall, we assume that there's <b>no air resistance.</b> </div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<b>The velocity vs time graph for freely falling object is a straight line passing through origin with positive gradient</b>. But why? Before drawing any graphs, you must consider what the equation that relates the parameters in question is. In our case, the equation is <span style="background-color: black;"> </span><span style="background-color: #444444;"><span style="color: white;">v = u + a . t </span></span>, where v = final velocity, u = initial velocity, a = acceleration due to gravity, and t = time.<br />
<br />
But, as we do not supply any initial velocity to the object, u = 0. So the equation becomes <span style="background-color: black;"><span style="color: white;"> v = a . t </span></span><br />
And since a = acceleration due to gravity, it's value is 9.81ms<sup>-2</sup><br />
Therefore, our final equation becomes <span style="background-color: black;"><span style="color: white;"> v = 9.81 * t </span></span><br />
<br />
This equation can be compared with <span style="background-color: black;"><span style="color: white;"> y = mx + c </span></span> where, c = 0. Now m = 9.81, which must be the gradient of the graph.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-kVfKJmGg7YR0DKC3BgVfJ6v0uoLXEVj99Eml3hAXsofITA6oNWaE2jbTSDI3Xu-EmE-uRbT-trYrMzJhulx5JLabywF49VhNPhWY-GarXK29WxUK9Kio77rg-mV-o3Zwa-NhvdfCTnY/s1600/velocity+vs+time.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="Velocity vs Time Graph Free Fall" border="0" data-original-height="591" data-original-width="866" height="218" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-kVfKJmGg7YR0DKC3BgVfJ6v0uoLXEVj99Eml3hAXsofITA6oNWaE2jbTSDI3Xu-EmE-uRbT-trYrMzJhulx5JLabywF49VhNPhWY-GarXK29WxUK9Kio77rg-mV-o3Zwa-NhvdfCTnY/s320/velocity+vs+time.png" title="Velocity vs Time Graph Free Fall" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Velocity vs Time Graph For Free Fall</td></tr>
</tbody></table>
<br />Hence, <b>velocity vs time graph for free fall is a straight line</b> with following properties:<br />
<br />
<ul style="text-align: left;">
<li><b>Passes through origin</b>. Why? Because if you compare <span style="background-color: black;"><span style="color: white;"> v = 9.81 * t </span></span> with <span style="background-color: black;"><span style="color: white;"> y = mx + c </span></span>, you'll find that c = 0, which is the y-intercept. If a line has y-intercept of 0, it must go through origin.</li>
<li><b>Has a gradient of 9.81</b>, Why? Again if you compare <span style="background-color: black;"><span style="color: white;"> v = 9.81 * t </span></span> with <span style="background-color: black;"><span style="color: white;"> y = mx + c </span></span>, you'll find that m has a value of 9.81, which is the slope of a straight line. </li>
</ul>
</div>

Velocity vs Time Graph For Freely Falling Object

In free fall, we assume that there's no air resistance. The velocity vs time graph for freely falling object is a straight line passing through origin with positive gradient. But why? Before drawing…

12 Sep 2019

Mitotic Cell Division Stages, Diagrams, & Summary (Explained!)

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSo7OcXsPWR9oTX3zxOZIbF5sAqjmgOwhBvv55owMonVNsL1fpGMR4LrEewejGCXhoCNJVcVPpV6hZ7lNCuSmrN7ChVKgolkX49foLLQZGLEz3YN1UjkpWCNqMaXDghkpTTK1IYwwBAWc/s1600/Cream+and+Brown+Vintage+Garage+Sale+Facebook+Post.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Mitotic Cell Division Stages" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSo7OcXsPWR9oTX3zxOZIbF5sAqjmgOwhBvv55owMonVNsL1fpGMR4LrEewejGCXhoCNJVcVPpV6hZ7lNCuSmrN7ChVKgolkX49foLLQZGLEz3YN1UjkpWCNqMaXDghkpTTK1IYwwBAWc/s320/Cream+and+Brown+Vintage+Garage+Sale+Facebook+Post.png" title="" width="320" /></a></div>
<br />
This article is about Mitosis Cell division and different stages of mitotic cell division.<br />
<br />
Mitosis is an equatorial division in which a mother cell divides to form 2 daughter cells. This was first observed by a German biologist, <i>Walter Flemming</i>, in 1877 AD.<br />
<br />
Mitosis takes place in vegetative or somatic cell. So, it is also called <b>Somatic Cell Division</b>.<br />
<br />
In general, mitosis is preceded by the 5 stages of Interphase ( During which the DNA is replicated). Then, it is often followed by cytokinesis, which divides the cytoplasm, organelles, and cell membrane into 2 new cell containing roughly equal shares of these cellular components. We will discuss each of these stages in details below.<br />
<br />
In mitotic cell division, the same number (diploid number) of chromosomes of the parent cell is maintained in each division of the cell. <i><u>The cell division in which a diploid parent cell divides biologically into 2 diploid daughter cells is called mitotic cell division.</u></i><br />
<i><u><br /></u></i>
Let's get into mitosis cell division stages.<br />
<br />
<h2 style="text-align: left;">
Interphase</h2>
Interphase is the non-dividing phase of Mitosis. In this phase, the actual cell division doesn’t occur. It is a phase of high metabolic activity, in which a cell makes all necessary preparations required for cell division. Interphase itself has is divided into 3 phases, namely G1 (first gap), S (synthesis), and G2(second gap).<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZWwbBkijW5QDtCQn2FWOjxUI3bVEwqP7HwokxfyX_6skP_DoaXC2mESB-SQocVF7NTsf7QxWP7uVLrAq16Ns86_XfdwTkJ20CU1OVgdTvKIYSYDsgxoDZW4mcWY6QpKbyiIw9mMX2MtU/s1600/interphase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="interphase diagram" border="0" data-original-height="218" data-original-width="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZWwbBkijW5QDtCQn2FWOjxUI3bVEwqP7HwokxfyX_6skP_DoaXC2mESB-SQocVF7NTsf7QxWP7uVLrAq16Ns86_XfdwTkJ20CU1OVgdTvKIYSYDsgxoDZW4mcWY6QpKbyiIw9mMX2MtU/s1600/interphase.png" title="" /></a></div>
During these 3 stages, the following activities take place:<br />
<br />
<ul style="text-align: left;">
<li>the cell grows by producing protein, and cytoplasmic organelles </li>
<li>Replication of DNA, and synthesis of histone protein take place which results in duplication of chromosomes</li>
<li>Chromosomes are replicated only during the "S" phase</li>
</ul>
In animal cells, the centrosome begins to divide. Chromosomes appear in the form of diffused, long & coiled network called chromatin fibers.<br />
<div>
<br />
<div>
<h2 style="text-align: left;">
Phases of Mitotic Cell Division</h2>
Mitosis is a continuous process. M<span style="background-color: white; font-family: "arial"; font-size: 13px; white-space: pre-wrap;">itosis cell division occurs in following 4 stages:</span><br />
1) Prophase<br />
2) Metaphase<br />
3) Anaphase<br />
4) Telophase<br />
<br />
<h3 style="text-align: left;">
Prophase (pro = before, phasis = stage)</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtSyUILXEOrLyXZUL_bI_QIefQOTwcvCSAPk8WSu8Pcge8Cdf8Wlyz3te_a0fcCj8aaQk6ACT3ThbXEA3OfSaN97eMsFFdcOMVjh1ORZVOg_dZAk-i9iuC_GcTWhQ_zunB9nKS9RIGIds/s1600/earlyprophase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="stages of mitotic cell cycle" border="0" data-original-height="229" data-original-width="217" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtSyUILXEOrLyXZUL_bI_QIefQOTwcvCSAPk8WSu8Pcge8Cdf8Wlyz3te_a0fcCj8aaQk6ACT3ThbXEA3OfSaN97eMsFFdcOMVjh1ORZVOg_dZAk-i9iuC_GcTWhQ_zunB9nKS9RIGIds/s1600/earlyprophase.png" title="" /></a></div>
<div>
<br /></div>
It is the first and longest stage of mitosis cell division. It lasts for 100 minutes. This stage involves a number of changes in the cell which take place simultaneously. In this stage, chromosomes are long, thin, and are like a thread. Each chromosomes has two chromatids. The two chromatids are joined at the centromere. The chromatin material condense into distinct thread like structure called a centromere and 2 sister chromatids which becomes shorter and thicker as the prophase proceeds. Nucleolus and nuclear membrane start disappearing towards the end of prophase. The two centrioles of the centrosome migrate towards opposite poles by forming spindle fibers.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCLaYJLNWm-DmHvl4xXE9l8GjL0yKA2XvlIDuCIuiIAQMBNycxu_kmmKj06-no7eM7Oxpt0iFlZ2FJqAPyGnI2-bDd2Z_B2nxsukmxLALkOadmD0j-atnt-EDWaMzRBdd6mx5AKFQkrDE/s1600/lateprophase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="mitotic cell division in animal cell" border="0" data-original-height="221" data-original-width="175" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCLaYJLNWm-DmHvl4xXE9l8GjL0yKA2XvlIDuCIuiIAQMBNycxu_kmmKj06-no7eM7Oxpt0iFlZ2FJqAPyGnI2-bDd2Z_B2nxsukmxLALkOadmD0j-atnt-EDWaMzRBdd6mx5AKFQkrDE/s1600/lateprophase.png" title="" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<h3 style="text-align: left;">
Metaphase (meta = between, phasis = stage)</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfhrIeQMmAJRFnRG2NlL-UTR7zdf_YSsAotR3SUHDvKENqTbhSbvYRS7Sl952ZECHsGSIIqAwOt8KlaDeY7pRfW_8x6T7QDfSOubmQVM-zsFM1C-a3apQeg_hGm-iL2aDKxLLG8tOZvXg/s1600/metaphase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="describe the process of mitotic cell division" border="0" data-original-height="274" data-original-width="148" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfhrIeQMmAJRFnRG2NlL-UTR7zdf_YSsAotR3SUHDvKENqTbhSbvYRS7Sl952ZECHsGSIIqAwOt8KlaDeY7pRfW_8x6T7QDfSOubmQVM-zsFM1C-a3apQeg_hGm-iL2aDKxLLG8tOZvXg/s1600/metaphase.png" title="" /></a></div>
It is the second stage or middle stage of mitosis which lasts for 15 minutes. In this stage, nucleolus and nuclear membrane disappear completely and nuclear spindle appears. Chromosomes come to lie on equator and arms face towards poles. Spindle fibers attach themselves to centromere of chromosome whereas chromosomes becomes shorter and thicker due to condensation.<br />
<br />
<h3 style="text-align: left;">
Anaphase (ana = back, phasis = stage)</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrNBefVkhf3AjEeYQOBBDzzWQyixcBUwZXmVcjvyF8N_tqUggdh0oUjJY9iF2H-js_JPpGoGw91m5pIX2DBpP1-RPIJ7DuVbXDPc-DHxCszjroK1w-LC3nRTDDrU78ITHUJ1Y0lrb9P0A/s1600/anaphase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="mitosis is the division of what type of cells" border="0" data-original-height="274" data-original-width="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrNBefVkhf3AjEeYQOBBDzzWQyixcBUwZXmVcjvyF8N_tqUggdh0oUjJY9iF2H-js_JPpGoGw91m5pIX2DBpP1-RPIJ7DuVbXDPc-DHxCszjroK1w-LC3nRTDDrU78ITHUJ1Y0lrb9P0A/s1600/anaphase.png" title="" /></a></div>
It is the third and shorter stage of mitotic cell division. This stage last for 10 minutes. In this stage, centromeres of each pair of chromatids appear to repel each other and are separated forming two daughters chromosomes. Whereas, chromosomes migrate towards opposite poles due to the contraction of spindle fibers and repelling force of sister chromatids and becomes shorter and thicker, and take the shape of "U" ,"V" or "J" depending on the position of centromere.<br />
<br />
<h3 style="text-align: left;">
Telophase (telo = end, phasis = stage)</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUlmqNsKD-ybdiniX4ptc4BpWlhthHcH_7J4zMCdAZFN7D0bLt_95V9lvNb1BghflmGaB-jAVs8-xkmTcWrm1pd9XFe2dRB9ckP6u7FA9JDD25COnAZkRJcqQJ9eQtDYnihWHCqZvDOIE/s1600/telophase.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="about mitosis cell division" border="0" data-original-height="275" data-original-width="190" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUlmqNsKD-ybdiniX4ptc4BpWlhthHcH_7J4zMCdAZFN7D0bLt_95V9lvNb1BghflmGaB-jAVs8-xkmTcWrm1pd9XFe2dRB9ckP6u7FA9JDD25COnAZkRJcqQJ9eQtDYnihWHCqZvDOIE/s1600/telophase.png" title="" /></a></div>
It is the fourth and last stage of karyokinesis. During this stage, the events of prophase occurs in reverse sequence. It last for 60 minutes. The daughter chromosomes reach their respective poles, uncoil, and change into chromatin network. Nuclear membrane reappears around the chromatin network of each pole.<br />
<br />
Therefore, two daughter nuclei with same number of chromosomes are formed.<br />
<br />
Nucleolus appears in each daughter nucleus and spindle fibers disappear.<br />
<br />
In animal cell, the centromere organizes itself above the nucleus at the end of karyokinesis.<br />
<br />
At the end of telophase, karyokinesis is followed by cytokinesis. i.e - division of cytoplasm.<br />
<br />
<h3 style="text-align: left;">
Cytokinesis (cyto = cell, kinesis= movement)</h3>
In this stage, the cytoplasm actually divides. In this stage, nuclear division occurs.<br />
<br />
The process is slightly different between animals and plants cell.<br />
In animal cells, there are actin filaments. These filaments interacts with each other causing the cell membrane to create cleavage furrow in them. The furrow then deepens, and eventually results in division of cell membrane to form two individual cells.<br />
<br />
In plant cell, it has a rigid cell wall. Cytokinesis is accompanied by cell plate formation. In this process, a new cell plate is formed in the middle of the cell. This cell plate continues to grow so that it reaches the cell membrane and finally combines with the cell’s original plate. Now the newly formed plate breaks forming two individual cells.<br />
<br />
<h2 style="text-align: left;">
Summary</h2>
<div>
<br /></div>
<h3 style="text-align: left;">
Prophase</h3>
In brief the following things occur during prophase:<br />
<ul style="text-align: left;">
<li>DNA condenses to form chromosomes</li>
<li>Nuclear membrane starts to fade
Nucleolus disappears</li>
<li>Centrioles start making spindle fires</li>
</ul>
<div>
<br /></div>
<h3 style="text-align: left;">
Metaphase</h3>
<br />
<ul style="text-align: left;">
<li>Chromosomes are joined by two spindle fibers</li>
<li>Chromosomes arrange themselves at the equatorial plane</li>
<li>Formation of equatorial phase occurs</li>
</ul>
<div>
<br /></div>
<h3 style="text-align: left;">
Anaphase</h3>
<br />
<ul style="text-align: left;">
<li>Spindle fibers shorten so that chromosomes pair separate and are taken towards each pole.</li>
</ul>
<div>
<br /></div>
<h3 style="text-align: left;">
Telophase</h3>
<br />
<ul style="text-align: left;">
<li>Separation of chromosomes complete in this phase</li>
<li>In animals cell, cleavage furrowing occurs</li>
<li>In plants cell, cell plate forms</li>
<li>Reformation of nucleus and nucleolus
Chromosomes uncoil</li>
</ul>
</div>
</div>
</div>

Mitotic Cell Division Stages, Diagrams, & Summary (Explained!)

This article is about Mitosis Cell division and different stages of mitotic cell division. Mitosis is an equatorial division in which a mother cell divides to form 2 daughter cells. This was first ob…

31 Aug 2019

20 Examples Of Scalar and Vector Quantities List

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8S2k3MzKtihdQGEDur_1ZcgG5el-ydep9XB1LX6Gx173Zz2tp5X1c6kAySjbfl8q-r553Y5r2bXTcWnJDfT_3ursXWpkjWFk2jpG5sl4vlk-IhQ4VIzwp9l-qnESdNcDD5gp2PukqnRM/s1600/Screen+Shot+2019-08-29+at+11.03.31+AM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="20 Examples Of Scalar and Vector Quantities List" border="0" data-original-height="401" data-original-width="480" height="267" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8S2k3MzKtihdQGEDur_1ZcgG5el-ydep9XB1LX6Gx173Zz2tp5X1c6kAySjbfl8q-r553Y5r2bXTcWnJDfT_3ursXWpkjWFk2jpG5sl4vlk-IhQ4VIzwp9l-qnESdNcDD5gp2PukqnRM/s320/Screen+Shot+2019-08-29+at+11.03.31+AM.png" title="" width="320" /></a></div>
<br />
In our previous post, we discussed about <a href="https://science-dudes.blogspot.com/2019/08/scalar-and-vector-quantities-definition.html" target="_blank">Scalars & Vectors</a>. But you might be wondering what are some examples of scalar quantity? Here's the list of 20 scalar and vector quantities.<br />
<br />
<h3 style="text-align: left;">
Scalar Quantities Examples</h3>
<div>
<ol style="text-align: left;">
<li>Length</li>
<li>Time</li>
<li>Mass</li>
<li>Temperature</li>
<li>Energy</li>
<li>Direct Current (DC)</li>
<li>Frequency</li>
<li>Volume</li>
<li>Speed</li>
<li>Amount of substance</li>
<li>Luminous Intensity</li>
<li>Density</li>
<li>Concentration</li>
<li>Refractive Index</li>
<li>Work</li>
<li>Pressure</li>
<li>Power</li>
<li>Charge</li>
<li>Electric Potential</li>
<li>Entropy</li>
</ol>
<h3 style="text-align: left;">
Vector Quantities Examples</h3>
</div>
<div>
<ol style="text-align: left;">
<li>Impulse</li>
<li>Force</li>
<li>Momentum</li>
<li>Velocity</li>
<li>Acceleration</li>
<li>Displacement</li>
<li>Angle</li>
<li>Alternating Current</li>
<li>Torque Of Couple</li>
<li>Weight</li>
<li>Thrust</li>
<li>Electric Field Strength</li>
<li>Magnetic Field Strength</li>
<li>Gravitation</li>
<li>Angular Velocity</li>
<li>Angular Momentum</li>
<li>Centripetal Force</li>
<li>Drag Force</li>
<li>Frictional Force</li>
<li>Tension</li>
</ol>
</div>
</div>

20 Examples Of Scalar and Vector Quantities List

In our previous post, we discussed about Scalars & Vectors. But you might be wondering what are some examples of scalar quantity? Here's the list of 20 scalar and vector quantities. Scalar Quantities…

28 Aug 2019

Cell Division Meaning, Definition, and Types For Dummies (Explained!)

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyW8UA94UtmuyQOdy200Ue50q9WvTp9F1Ka82xUWEsdJ3Gi3STHo3u1sI-GqiW6roLoIQJrnmcnfIn-TlvWK-V5dEi2wxYDh1VLSpTL4bwaojhMZb4z_S3SHsretU-2edVlOfhCnq4IiM/s1600/Black+Biking+Fitness+For+Men+Facebook+Post.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="cell division definition" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyW8UA94UtmuyQOdy200Ue50q9WvTp9F1Ka82xUWEsdJ3Gi3STHo3u1sI-GqiW6roLoIQJrnmcnfIn-TlvWK-V5dEi2wxYDh1VLSpTL4bwaojhMZb4z_S3SHsretU-2edVlOfhCnq4IiM/s320/Black+Biking+Fitness+For+Men+Facebook+Post.png" title="" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<h3 style="text-align: left;">
What is a Cell?</h3>
A biological cell is defined as the fundamental, structural, and functional unit of life. The bodies of living organisms are made up of microscopic units known as cells. Cells, themselves, are made up of a life giving substances called protoplasm, cell organelles, and inclusions.<br />
<br />
<h3 style="text-align: left;">
Define Cell Division</h3>
<div>
The biological process in which an existing cell divides into two or four daughter cells is called cell division.<br />
<br /></div>
<h3 style="text-align: left;">
Why Does Cell Division Occur?</h3>
<div>
Cell division is a vital part of life. Our bodies grow because of cell division. When older cells die, new cells must replace their position. Similarly, <b>cell division helps in reproduction.</b> Cell division is essential for continuity of a species. All of the structure of a parent cell are duplicated in cell division and divides into two or more daughter cells. In unicellular organisms, cell division is a means of reproduction because it directly produces two daughter organisms.<br />
<br /></div>
<div>
Cell division has 3 important aspects:<br />
<ol style="text-align: left;">
<li>Replication of DNA</li>
<li>Karyokinesis (division of nucleus), </li>
<li>and Cytokinesis (division of cytoplasm). </li>
</ol>
<div>
In cell division, the Karyokinesis is followed by Cytokinesis.<br />
<br /></div>
<h3 style="text-align: left;">
Types of cell division</h3>
On the basis of mode of nuclear division, cells are divided into 3 different ways.<br />
They are:<br />
<ol style="text-align: left;">
<li>Amitosis (also known as Binary fission)</li>
<li>Mitosis</li>
<li>Meiosis

</li>
</ol>
<div>
In the next post, we will explore each of these types in details.</div>
</div>
</div>

Cell Division Meaning, Definition, and Types For Dummies (Explained!)

What is a Cell? A biological cell is defined as the fundamental, structural, and functional unit of life. The bodies of living organisms are made up of microscopic units known as cells. Cells, themse…

28 Aug 2019

Definition and Meaning Of Acceleration Due To Gravity in Physics

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKadCjvKIP78gyVucYdCL68rHSWwBV7Ov1eFLsfUdaB_pcJWEoOhd5MO3P_dwtqnyOMFx5jJT4CYDSsBs3pbaN2pZydk_XHvcpELCfDGkXdjiTvNbPvRkntLYHMYmWAY5h0m30tTDELiQ/s1600/Cream+and+Blue+Fishes+Seafood+Celebration+Facebook+Post.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Define the term acceleration due to gravity" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKadCjvKIP78gyVucYdCL68rHSWwBV7Ov1eFLsfUdaB_pcJWEoOhd5MO3P_dwtqnyOMFx5jJT4CYDSsBs3pbaN2pZydk_XHvcpELCfDGkXdjiTvNbPvRkntLYHMYmWAY5h0m30tTDELiQ/s320/Cream+and+Blue+Fishes+Seafood+Celebration+Facebook+Post.png" title="" width="320" /></a></div>
<b><br /></b>
<b>Define the term acceleration due to gravity:</b> <i>The acceleration of an object which is solely caused due to the gravitation field of any heavenly body, say Earth, is known as acceleration due to gravity</i>. Acceleration due to gravity of Earth is 9.81 ms<sup>-2</sup>, Mercury is 3.7 ms<sup>-2</sup>, Venus is 8.87 ms<sup>-2</sup>,  and Moon is 1.62ms<sup>-2</sup><br />
<br />
So here's the definition. But what does it really mean when someone says "acceleration due to gravity"?<br />
<br />
Let's imagine that you're on an airplane and you've an object in your hand, say a guitar. Then, you throw the object out of the plane. Now the object is in open air, can you tell me what forces are acting on the guitar after you threw it? Obviously, the force of gravity. (But keep in mind, that the earth has atmosphere due to which any object moving in open air also experiences a drag force, called air resistance or air drag. For the sake of simplicity, we are going to assume that there's no air resisting the guitar's motion.) Now the object moves towards the center of the earth with increasing velocity. Since the velocity is changing, the object has acceleration. This acceleration is caused by gravitational force of the earth, hence this acceleration is called "acceleration due to gravity". For earth, it's fixed and its value is 9.81 ms-2.<br />
<br />
Notice why i told you to ignore the presence of air resistance? This is because for any acceleration to be qualified as acceleration due to gravity, <b>it must not be affected by any other force except the gravitational force between the object and heavenly body</b>. This is why the definition itself says "solely caused due to gravitational field of heavenly body".</div>

Definition and Meaning Of Acceleration Due To Gravity in Physics

Define the term acceleration due to gravity: The acceleration of an object which is solely caused due to the gravitation field of any heavenly body, say Earth, is known as acceleration due to gravity…

28 Aug 2019

Discuss The Role Of Chromosomes in Cell Division and Inheritance/Heredity

<div dir="ltr" style="text-align: left;" trbidi="on">
Wondering what does chromosomes do during cell division? This article provides superficial explanation of the main function of chromosomes in cell division and in inherited traits and characteristics.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFX29UjNF4ZxuYSxYhRTyvnXPnFa5__oOALebd3azpTHtoG3GnHn8Pc-CFhX8REJkJa7h45U2PXS2Emo_gj-KMNYVMtOpsZuxAxNFnAgVsCAzAwXzidxgLjuP02uxYoiiHnD0QTvpGvrs/s1600/Steel+Blue+People+Men%2527s+Fashion+Facebook+Post-2.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Role Of Chromosomes in Cell Division and Inheritance" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFX29UjNF4ZxuYSxYhRTyvnXPnFa5__oOALebd3azpTHtoG3GnHn8Pc-CFhX8REJkJa7h45U2PXS2Emo_gj-KMNYVMtOpsZuxAxNFnAgVsCAzAwXzidxgLjuP02uxYoiiHnD0QTvpGvrs/s320/Steel+Blue+People+Men%2527s+Fashion+Facebook+Post-2.png" title="" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
Chromosomes are the organized structure of DNA(Deoxyribonucleic Acid) and protein which is found in nucleus of both plant and animal cells. Before a cell divides, the chromosome are replicated within the nucleus. In a human cell, the nucleus of cell division contains 46 pair of chromosomes. Organisms grow by undergoing cell division to produce new cells and replace older one. As the genetic material passes from parents to child, <b>the chromosomes are responsible for containing the instructions that makes the offspring unique while still carrying traits from the parents</b>. It's essential that certain cells, like reproductive cell, have correct number of chromosomes in order to function properly. It also helps to ensure that the DNA should be remain tightly around the proteins otherwise DNA molecules will be larger in the inside of cells.</div>

Discuss The Role Of Chromosomes in Cell Division and Inheritance/Heredity

Wondering what does chromosomes do during cell division? This article provides superficial explanation of the main function of chromosomes in cell division and in inherited traits and characteristics…

28 Aug 2019

Fish Swim in Water With The Help Of? Movement Of Fish in Water

<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5b7cJG_gdDubMSRr5l65JZp4P3pgf6zE-AGgnDzZIIWHH6uLfy0hJID13ofgFmfPmg6zqvS-cc3I3eyWZpFAhSk6Ouj3kMdITCt2I168O06LuhqE2C6FLdcoflc_MFQ5IxXE0p3l0R_I/s1600/Pink+Hobbies+Facebook+Post.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Fish Swim in Water With The Help Of" border="0" data-original-height="789" data-original-width="940" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5b7cJG_gdDubMSRr5l65JZp4P3pgf6zE-AGgnDzZIIWHH6uLfy0hJID13ofgFmfPmg6zqvS-cc3I3eyWZpFAhSk6Ouj3kMdITCt2I168O06LuhqE2C6FLdcoflc_MFQ5IxXE0p3l0R_I/s320/Pink+Hobbies+Facebook+Post.png" title="" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
You might be wondering why can fishes swim in water but many other animals cannot? Well, it's because they have some special parts which enable them to swim inside water.<br />
<br />
How to describe fish swimming?<b> </b>Well, <b>Fish swim in water with the help of Fins</b>. Unlike most animals, fishes do not have limbs. They rely entirely on their fins for their locomotion. The picture below shows the fins of a fish.<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaDqOTuMI5HAzIVjueQQM5a9cpghfX7nFrs03akUpDTxj-JkfmyutuCFNWAq4xKUAa_Uq_pVIF5wyS5VfleTgjDGA7BnJXx8tt1p32gXlMRZBgUWx5qLuSpNK-YMNIFO3fA78MS5Gydwo/s1600/fish-1346521_960_720.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="how do fishes swim in water" border="0" data-original-height="526" data-original-width="960" height="175" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaDqOTuMI5HAzIVjueQQM5a9cpghfX7nFrs03akUpDTxj-JkfmyutuCFNWAq4xKUAa_Uq_pVIF5wyS5VfleTgjDGA7BnJXx8tt1p32gXlMRZBgUWx5qLuSpNK-YMNIFO3fA78MS5Gydwo/s320/fish-1346521_960_720.jpg" title="" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
The size and number of fins in any fish can differ from another fish. Generally, fishes of same breed have same number of fins but it can differ. Fishes have streamlined body which helps them swim in water. As you see in the above picture, fishes have different kind of fins. Each of them has their own function. Fins can be in pair or unpaired. Unpaired fins help fishes to maintain balance while swimming. The fin near their tail, called "Tail Fin", helps them move forward, acting like a propeller. Fishes also have pectoral fins which help them to change or maintain direction. Check the animated image below. See how these fishes uses their pectoral fin to change their direction?<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM8iCzAW8u5cMOpxC_jxr4s7oz8ZeMeqsm0TJDohEOPyTIq0wRZ1SIXq1Psae8rqFxoswXm4PsrzaodSNtwzey-36u9ZihAgK-AR2KweOuTo-PsjeV3N34VUSubkN9tZoTofzI7eKZBbA/s1600/goldfish.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="450" data-original-width="600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiM8iCzAW8u5cMOpxC_jxr4s7oz8ZeMeqsm0TJDohEOPyTIq0wRZ1SIXq1Psae8rqFxoswXm4PsrzaodSNtwzey-36u9ZihAgK-AR2KweOuTo-PsjeV3N34VUSubkN9tZoTofzI7eKZBbA/s320/goldfish.gif" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Taken From Genome.gov</td></tr>
</tbody></table>
</div>

Fish Swim in Water With The Help Of? Movement Of Fish in Water

You might be wondering why can fishes swim in water but many other animals cannot? Well, it's because they have some special parts which enable them to swim inside water. How to describe fish swimmin…

28 Aug 2019

Load more posts