Unit 7: Natural selection
1,100 possible mastery points
About this unitAre you ready to learn the ins and outs of evolution? From how natural selection drives change to the different ways species arise and go extinct, this unit will take you on an exciting journey through the history of life on Earth.
Imagine a green caterpillar on a brown tree trunk—oh, too late, a bird's eaten it.
How is a cabbage like a poodle?
A group of lizards drifts on a log to a desert island. What happens next?
Math meets biology.
What evidence does evolution leave behind? How do fossils, embryos, and nucleotides help us analyze the branching tree of life?
Cat or mouse? On a cellular level, their differences aren't so noticable.
Your family tree may be a little bigger than you thought...
What caused the extinction of Megalodon, the 30-ton Miocene shark? Not that I'm complaining.
Genetic variation and resilience go hand-in-hand.
Primordial soup for the scientific soul.
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