NATURAL SELECTION. There are 2 variations of the beetles, green and red. The birds prefer eating the green beetles. Over generations the red beetles increase in population because they are not eaten by the birds. More survive to produce more offspring. Generations later….
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The birds prefer eating the green beetles.
Over generations the red beetles increase in population because they are not eaten by the birds.
More survive to produce more offspring.
Over time the red beetles have been selected over the green beetles
So what happens to the birds now?
4) What is it called when the # brown rabbits increases over time?
5) What if the environment changed to the arctic?
Brown are camouflaged
or move faster
Brown survive, reproduce & their babies are brown
The white rabbits would survive better and
the # white bunnies would increase
Voyage of H.M.S. Beagle, 1831 - 1836
BEHAVIORAL: This monkey is using tools to get food
CHEMICAL: this orchid smells like a female bee
Change through use and disuse
Ancestors had different neck lengths
Through natural selection, longer necks survived and passed on their genes.
Eventually all giraffes had long necks.
225 Million Years Ago the continents were together making a super continent called Pangaea
We did not come from monkeys, we just share a common ancestor