Answers24 - 25 CR - Biology B 0411KBLab: Natural Selection-Standard Bio 4.2

Lab: Natural Selection Answers

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1
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In this lab, the three flocks of birds changed in numbers between generation 1 and generation 3. Why? Check all reasons.

A
The amount of food available increased and decreased.
B
If a flock’s beak type made it easier to pick up the available food, the flock grew.
C
If a flock’s beak type made it harder to pick up the available food, the flock shrunk.
2
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How does nature “select” phenotypes, such as bird beaks? Check all correct explanations.

A
Organisms can choose the genes that will make them most successful.
B
The environment influences which alleles an organism can pass on to its offspring.
C
Traits that suit the environment enable an organism to reproduce in greater numbers.
D
Traits that do not suit an environment make it harder for an organism to stay alive and reproduce.

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Lab: Natural Selection Answers — 24 - 25 CR …