Brown beetles are a little more likely to survive to produce offspring. Paraphrase this situation and draw the image: Imagine that green beetles are easier for birds to spot (and hence, eat). Natural selection acting on individuals, leads to the evolution of populations.ġ3 Slide 2 of 5 Natural Selection is when the environment selects favorable traits for survival. Explain which mouse gets hunted first and why.ġ1 EQ: Under what conditions does Natural Selection occur?ġ2 Slide 1 of 5 Natural selection acts on individuals. You are a hawk hunting above a mix of sandy and lava rock terrain, and you spot two mice (one tan and one black) running for shelter. Quietly count! How many moths are on this slide? Which moths will most likely be eaten first, and why? How does natural selection affect populations?ģ How does natural selection affect populations? 102 103Ģ How does natural selection affect populations? While mutation is random, natural selection is not. The environment plays a role in changing the frequency of a mutant allele in a population. The appearance of dark-colored volcanic rock cause the mutation for black fur to appear in the rock pocket mouse population 4. The same mutation could be advantageous in some environments but deleterious in others. Mutations are caused by selective pressure in the environment. 1 Natural Selection Pocket Mice 102 103 T/F Statement Explanationġ.
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