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Science
Baitang 5–6
Adaptation and Natural Selection
Adaptation and Natural Selection
Ibinahagi ni Ahmad Alsalloum
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1
What is an adaptation?
A
A random change in an organism's DNA
B
A change in an organism's body during its lifetime
C
A feature that helps an organism survive and reproduce in its environment
D
A behavior that an animal learns from its parents
2
Which of the following is an example of a behavioral adaptation?
A
A cactus's thick stem
B
Birds migrating to warmer climates in winter
C
A polar bear's white fur
D
A shark's sharp teeth
3
Natural selection is best described as:
A
The process by which organisms with advantageous traits are more likely to survive and reproduce
B
The gradual change of an environment over time
C
The deliberate choice of traits by an organism
D
The random mutation of genes in a population
4
Why do some adaptations become more common in a population over many generations?
A
Because all organisms in the population develop the same traits
B
Because individuals with those adaptations are more likely to survive and pass on their genes
C
Because the environment changes to suit those adaptations
D
Because organisms decide they need those adaptations
5
A population of beetles lives in a forest. Most beetles are green, but a few are brown. Birds eat the green beetles because they are easier to see on brown tree trunks. What will likely happen to the beetle population over time?
A
The beetle population will not change because color does not affect survival.
B
All beetles will become brown immediately.
C
The brown beetles will become more common because they are better camouflaged.
D
The green beetles will become more common because they can hide better.
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