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Herb

Unit 2 - Ecosystems & Ecology

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Globe Showing Europe Africa

Unit 1 - Foundations Of Environmental Systems & Societies

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Flexed Biceps

Unit 3 - Biodiversity & Conservation

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Writing Hand

Unit 4 -Water & Aquatic Food Production Systems & Societies

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Deciduous Tree

Unit 5 - Soil Systems & Terrestrial Food Production Systems & Societies

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Cloud

Unit 6 - Atmospheric Systems & Societies

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Thermometer

Unit 7 - Climate Change & Energy Production

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Briefcase

Unit 8 - Human Systems & Resource Use

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Bar-Chart

Internal Assessment

Humor break: Remember when your teacher told you that you&#39;re unique? Well, they weren&#39;t lying. This is exactly what Charles Darwin said about species too. (But it&#39;s not like he knew you personally!)

In 1859, Charles Darwin sparked a revolutionary idea with his book &quot;On the Origin of Species&quot;. He proposed the theory of evolution by natural selection.

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Real-World Example: Imagine Darwin as an avid gardener sowing the seeds of knowledge. The seeds (his theory) have grown into a forest of understanding about the biodiversity we see today.

According to Darwin, species vary in their characteristics. The ones best suited for their environment are more likely to survive - the Fitness Factor!

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Real-World Example: Picture the cactus, adapted to survive in harsh desert conditions. The lack of leaves reduces water loss, making it fitter than a maple tree would be in the same environment.

he fittest individuals reproduce, passing their winning traits to the offspring. Those not so well adapted? Well, they might not get to join the parenthood club! 
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Real-World Example: Let&#39;s say, in a world of pink flowers, a mutation gives rise to a blue flower. If bees prefer this blue spectacle and help it pollinate more, then more blue flowers will crop up in the future

Genetic characteristics play a crucial role in determining survival. Successful traits get passed on, while others might slowly disappear.

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Real-World Example: Remember the famous Peppered Moth? The industrial revolution blackened the trees, giving a survival advantage to darker moths over their light-colored cousins. The genetic shift? More dark moths!

<ul>
	<li>Populations within a species show variation. (Just like not all humans have the same eye color)</li>
	<li>Species tend to overproduce. (Think of a frog laying hundreds of eggs)</li>
	<li>Yet, the population levels remain constant. (Only a few of those eggs will make it to adulthood)</li>
	<li>Overproduction leads to a resource tug-of-war. (More frogs, same amount of flies)</li>
	<li>The fittest ones survive and reproduce. (The frog that&#39;s best at catching flies gets to carry on their lineage)</li>
	<li>They pass on their successful traits. (Their froglets are also good at catching flies)</li>
	<li>Over time, this changes the population&rsquo;s gene pool and new species can emerge. (Maybe someday we&#39;ll have super-fly-catching-frogs!)</li>
</ul>

Humor Break: So, there you have it! Evolution isn&#39;t about who&#39;s the strongest or the fastest, it&#39;s about who&#39;s the best at catching flies... well, metaphorically speaking!

Darwin's Evolution Secrets Unveiled!

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Standard Level

Environmental Systems & Societies SL

Unit 2 - Ecosystems & Ecology

Darwin's Evolution Secrets Unveiled!

Table of content

The darwinian insight

Adapt or not, that's the question

Unlock the Full Content!

Unit 2 - Ecosystems & Ecology

Darwin's Evolution Secrets Unveiled!

Table of content

The darwinian insight

Adapt or not, that's the question

Unlock the Full Content!