7th Grade Final Review

Which adaptation is least important for human survival?

• opposable thumbs

• eye color

• language

• walking upright

What best explains a benefit of genetic variation in a species?

• It is takes less energy for organisms to maintain.

• It allows most organisms to find appropriate mates.

• It occurs even among organisms that are isolated.

• It ensures some organisms can survive an environmental change.

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NGSS.MS-LS4-4

According to the Darwin's theory, variations in finches seen in the Galapagos Islands resulted from?

• natural selection

• transmission of acquired characteristics

• similar traits

• use or disuse of their beaks

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What natural occurrence would most likely lead to a species inability to adapt?

• a decrease in hurricane activity

• an increase in global warming

• an increase in primary producers

• decrease in genetic diversity

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A biologist cross-pollinates a tomato plant that is resistant to disease with a tomato plant that produces larger tomatoes. What is this known as?

• natural selection

• selective breeding

• asexual reproduction

• natural selection

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NGSS.MS-LS4-4

There are three dogs classified as toy, miniature, and a standard. What are these dogs specifically bred for?

A polar bear has white fur and lives in the arctic. What best describes why white fur would be favored by natural selection over other fur colors?

• White fur helps polar bears stay warm

• A white coat attracts more prey

• White fur acts as camoflauge

• Polar bears chose mates with white fur

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NGSS.MS-LS4-4

What is an important ability of turtles to have a better chance of survival since newly hatched turtles are easy prey?

• They lay hundreds of eggs so at least a few will survive

• They can dig a hole and hide from predators

• The ability to fight off predator

• They produce a toxin which makes them taste bad

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NGSS.MS-LS4-4

Which factor will most likely increase the chance of survival of an organism living in an environment undergoing rapid change?

• Encountering strong competition

• Producing identical offspring

• Having a diverse gene pool

• Having a long lifespan

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Diversity within a species is important because

• It increases the chance of survival under changing conditions

• It ensures a variety of reproductive methods for a species

• It increases the available ecosystem resources

• It ensures high levels of competition

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