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Page Facing Up

Theme B - Form & Function

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Direct Hit

Theme A - Unity & diversity

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Pill

Theme C - Interaction &  Interdependence

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Keycap Digit One

Theme D - Continuity & Change

Fertilization = Male gamete + Female gamete = Single Cell.

<ul>
	<li>Think of it like mixing two magical ingredients to create the starting point of life!</li>
</ul>

<ul>
	<li>This single cell (from fertilization) doesn&#39;t remain alone. It starts dividing to make an embryo with many cells.</li>
	<li>The method of division? Mitosis.
	<ul>
		<li>Mitosis is like a cloning machine; it ensures every new cell is an identical twin!</li>
	</ul>
	</li>
</ul>

<ul>
	<li>Cells in an early-stage embryo are like Jack-of-all-trades: they&#39;re unspecialized.</li>
	<li>As they grow, they choose career paths! They specialize and get better at specific jobs. This is like picking your favorite subject in school and becoming an expert in it.</li>
	<li>This career choice? Called Differentiation.</li>
</ul>

<ul>
	<li>Differentiation: Process where cells develop differently to do specific tasks.
	<ul>
		<li>E.g., Some cells decide to pump blood (heart cells), while others become great at protecting our body (skin cells).</li>
	</ul>
	</li>
	<li>Why specialize? Specialized cells are more efficient!
	<ul>
		<li>Imagine if a chef also had to be a firefighter and a pilot at the same time. Exhausting, right? Specialization lets the cell be the best at one job.</li>
	</ul>
	</li>
</ul>

<ul>
	<li>When a cell uses a gene, it&#39;s like turning on a light switch! We say the gene is &quot;expressed.&quot;
	<ul>
		<li>Cells using genes is like reading a recipe book, only choosing the recipes they need for their role.</li>
	</ul>
	</li>
	<li>Different cells? Different gene recipes! That&#39;s why cells differentiate.</li>
</ul>

<ul>
	<li>Cells need a map! Where they are determines their future job.
	<ul>
		<li>Imagine moving to a beach town and becoming a surfer or going to a city and becoming a banker.</li>
	</ul>
	</li>
	<li>How do they know their position? Through signalling chemicals that act like GPS.
	<ul>
		<li>These chemicals tell genes what to do or what not to.</li>
	</ul>
	</li>
</ul>

<ul>
	<li>Signalling chemicals guide cells on their differentiation journey.</li>
	<li>One cool guide: Retinoic acid.
	<ul>
		<li>It&#39;s like a tour guide helping cells decide if they want to be a part of the lungs, kidneys, or even forelimbs!</li>
	</ul>
	</li>
</ul>

Real-World Example: Think of cells like students in a school. At first, they might not know what they want to specialize in. But as they go through different grades, they might decide to be experts in math, science, or arts. Just like this, cells start unspecialized, but as they grow, they choose their specialization!

&nbsp;

🎈 Remember: From just one cell after fertilization, we get a vast universe of specialized cells, each playing its part in the grand scheme called life! Happy studying, future biologist! 🌍🦠🔍

Theme B - Form & Function

Cell Differentiation After Fertilization A Journey From Fusion To Specialization

Table of content

What's fertilization? 🥚+🐟 = 🦄

Multicellular organisms & the magic cell 🌟

All-rounder to specialist 🎩

Differentiation - the ultimate career fair 🎪

Unlock the Full Content!

Theme B - Form & Function

Cell Differentiation After Fertilization A Journey From Fusion To Specialization

Table of content

What's fertilization? 🥚+🐟 = 🦄

Multicellular organisms & the magic cell 🌟

All-rounder to specialist 🎩

Differentiation - the ultimate career fair 🎪

Unlock the Full Content!