Question 1
What is natural selection?
A. $The$ process by which individuals with advantageous inherited traits are more likely to survive and reproduce. B. $The$ process by which organisms choose the traits they want their offspring to have. C. $The$ sudden appearance of identical offspring in every generation. D. $The$ movement of organisms from one habitat to another.
Question 2
Which statement best describes variation in a population?
A. All individuals in a population are exactly the same. B. Individuals in a population differ in their traits. C. Variation only happens because organisms need to adapt. D. Variation means every organism has a new mutation each day.
Question 3
Which condition is essential for natural selection to occur?
A. Heritable variation in a population B. All individuals producing the same number of offspring C. No environmental change at all D. Every trait being acquired during life and then inherited
Question 4
What is meant by the term fitness in natural selection?
A. How strong an organism is in a physical contest B. How well an organism survives and produces offspring in its environment C. How long an organism lives compared with others in the population D. How large an organism is when fully grown
Question 5
A population of insects has some individuals with a mutation that makes them harder for birds to eat. Over time, this trait becomes more common. What best explains this change?
A. Individuals learned to avoid birds and passed the skill to offspring B. Birds caused the insects to grow harder shells during their lives C. Insects with the protective trait survived and reproduced more often D. All insects mutated in the same way because they needed protection
