Adaptations and Survival

Why do animals shiver?

• to conserve energy

• to move faster

• to obtain more oxygen

• to increase body temperature

The rock ptarmigan is a bird species that lives in the Arctic and subarctic areas of Europe, Asia, and North America. As the winter season begins, the rock ptarmigan sheds its usual brown feathers to uncover its white feathers. Why do the rock ptarmigan's feathers change colors?

• to camouflage itself

• to prepare for hibernation

• to get ready for migration

• to mimic other birds

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The shoal surgeonfish has a scalpal-like thorn on its tail fin. How does the structure help the surgeonfish?

• It helps the surgeonfish locate food.

• It helps the surgeonfish faster.

• It helps the surgeonfish attract a mate.

• It helps the surgeonfish keep predators away.

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The yellow and black-colored American hoverfly very closely resembles the bumblebee. Though the American hoverfly is harmless, the sting of a bumblebee is painful and venomous. Many predators of the American hoverfly often think it is a bumblebee and avoid attacking it. What type of behavior is shown by the American hoverfly?

• camouflage

• courtship

• hibernation

• mimicry

A farmer planted different varieties of ginger plants in her field. The temperatures during the winter months dropped very low, and while most varieties were killed, a few survived. Which factor explains why some ginger varieties survived?

• genetic variations

• low rate of mutations

• quick rate of reproduction

• small population

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The drawing shows birds that are adapted to their environment. How are the ducks adapted to an aquatic environment?

• by having thick feathers to stay warm

• by having small eyes to see far distances

• by having a white head to be camouflaged

• by having webbed feet for swimming

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Which plant structure absorbs water and nutrients from the soil and stores extra food for the plant?

• flower

• leaf

• root

• stem

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The black bear and brown bear are two different species of bear. They share similarities in the type of food they eat and the way they interact with other animals. What type of interaction will both animals share if they are located in the same forest?

• A black bear will act as a predator to a brown bear.

• A brown bear will act as a predator to a black bear.

• Both the black bear and the brown bear will compete for the same resources.

• Both the black bear and the brown bear will remain unaffected by each other's activities.

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A researcher hypothesizes that humans, mice, and bats evolved from a common ancestor. Which evidence supports the researcher's hypothesis?

• These three species have homologous structures.

• These three species are omnivores.

• These three species are multicellular.

• These three species have analogous structures.

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How does the comparison of the stages of embryological development of different species help biologists to classify life?

• It helps in understanding the similarities between living species and extinct species.

• It reveals anatomical similarities that are not always evident in fully formed organisms.

• It reveals differences in the environmental conditions necessary for species survival.

• It helps in understanding the different behavioral strategies in different individual organisms.

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