1) A population of mice lives in a dark volcanic rock environment. Which statement best explains how the population became mostly black over time? a) The mice that naturally had dark fur survived predators and passed that genetic trait to their offspring. b) The mice purposefully changed their fur color to hide from predators. c) The volcanic ash stained the mice's fur black over many generations. 2) Why is genetic variation within a population crucial for the survival of a species? a) It increases the probability that some individuals will have advantageous traits if the environment suddenly changes. b) t ensures that every individual in the population is perfectly adapted to the environment. c) It forces the population to undergo artificial selection. 3) A structural adaptation, such as the thick blubber on a walrus, is the result of... a) Generations of survival and reproductive success by individuals who inherited the trait for thicker fat. b) The walrus choosing to eat more food to stay warm in the Arctic. c) Asexual reproduction creating identical, fat offspring. 4) Which best describes natural selection? a) Better traits spread b) Traits never change c) All survive equally d) Selection is random 5) Which is a structural adaptation? a) Migration timing b) Hibernating c) Camouflage coloring d) Venom production 6) Which is a behavioral adaptation? a) Thick fur b) Webbed feet c) Antifreeze proteins d) Bird migration 7) Which is a physiological adaptation? a) Shell pattern b) Venom production c) Beak shape d) Pack hunting 8) How do advantageous traits become more common over generations? a) Individuals choose traits b) Traits skip genes c) More offspring survive d) All traits increase 9) What does "fitness" mean in evolution? a) Reproductive success b) Physical strength c) Longer lifespan d) Bigger size 10) What is one source of variation in traits? a) Need b) Choice c) Practice d) Mutations 11) If the environment changes, what may happen to a population? a) Different traits favored b) All survive equally c) All traits disappear d) Evolution stops

Adaptations & Survival

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