Genes and Adaptations

Which of the following scenarios demonstrates how genetic variation may result from a change in the environment?

• A trout swims faster as it enters cold water.

• An iguana increases its body temperature because it moves to the top of a rock in desert sunlight.

• An artic fox's coat changes color over time because it migrates to an area with a different climate.

• A caterpillar stands out to predators because it moves in an area with a different color than its own.

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8.L.4.2

Which adaptation is MOST useful in a windy environment?

• long fragile roots

• short sturdy stems thtransparent

• thin transparent leaves.

• tiny flowers

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8.L.4.2

A salt marsh has a salinity measurement that varies between 0.01-100 ppm. Which adaptation is likely to help a population in this environment?

• adaptations to collect sunlight

• adaptations that help with water conservation

• adaptations that help in seed dispersal

• adaptations that can purify water

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8.L.4.2

Which of the following is an explanation for why some plants are posisonous?

• Plants are unable to actively escape predators, poison developed in plants as a defense mechanism.

• Predators have the capability to digest the poison, while humans do not.

• Plants evolved poison to exchange genetic information with other plants.

• There aren't any instances of poisonous plants.

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8.L.4.2

In the total darkness of a deep natural cave, what type of adaptations do you expect to see in animals?

• adaptations relating to bright and colorful markings on the skin

• adaptations relating to an increase in non-sighted sensory input

• adaptations relating to using sunlight as a food source

• adaptations relating to the conservation of limb length

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8.L.4.2

The Siberian tiger is found in the northern climates of Siberia while the Bengal tiger is found mainly in India. The Siberian tiger has a light, orange, thick coat while the Bengal tiger has a dark orange, thin coat. What MOST LIKELY caused the differences in their coats?

• a difference in their hunting behavior

• a commensal relationship that formed between the two tiger species

• a difference in climate causing the appearance of different adaptations

• pressures from the fossil record

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8.L.4.2

The fruit fly population in a particular orchard has many members. Each female fly lays many eggs over the course of her 30-day lifespan. If the environment changed quickly, how would the fruit fly population MOST LIKELY be affected?

• The fruit fly population would likely adapt to the change and survive.

• The fruit fly population would not adapt at all to the change and would become extinct.

• The fruit fly population would begin to reproduce quickly.

• The fruit fly population would adapt by living longer.

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8.L.4.2

Which of the following statements BEST summarizes the difference, or lack thereof, between genetic variations and adaptations?

• Genetic variations and adaptation are the same things.

• Genetic variations include all types of slight differences in DNA translation in traits of organisms, while adaptations are only the genetic variations that increase an organism's chance of surviving and reproducing.

• Genetic variations include all types of slight differences in DNA translation in traits of organisms, while adaptions are only the genetic variations that decrease an organism's chance of surviving and reproducing.

• Adaptations include all types of slight differences in DNA translation in traits of organisms, while genetic variations are only the adaptations that affect, for better or worse, an organism's chance of surviving and reproducing.

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8.L.4.2