Life Science Review

Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. How do these actions most BENEFIT plants?

• By returning nutrients to the soil.

• By releasing oxygen into the air.

• By making space for new animals.

• By decreasing the population of herbivores.

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Which statement correctly describes the transfer of energy in a food chain in this wetland?

• Energy is transferred from hawks to shrews to grasshoppers to marsh grasses.

• Energy is transferred from marsh grasses to crickets to hawks to frogs.

• Energy is transferred from grasshoppers to crickets to frogs to hawks.

• Energy is transferred from cattails to crickets to shrews to hawks.

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Which of these describes one or more living organisms that depend on another organism to survive?

• bacteria living in the mouth of a dog

• aloe vera plants growing next to a fence

• mold living on a rock

• pufferfish releasing carbon dioxide into pond water.

Aquatic plants have adaptations that help them live in water. For example, the part of the plant that makes food is located on the TOPS of FLOATING plant leaves.

This adaptation helps the plants---

• stay anchored

• avoid predators

• absorb sunight

• capture fish

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Which of the following is an example of a mutualistic relationship in an ecosystem?

• A lion hunting a zebra

• A bee pollinating a flower

• A parasite infecting a host

• A bird eating insects off a buffalo

A group of similar cells working together is called...

• cell

• tissue

• organ

• organ system

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Which system in the human body is responsible for transporting blood, nutrients, gases, and wastes?

• Digestive System

• Circulatory System

• Nervous System

• Respiratory System

What is the basic unit of heredity that is passed from parents to offspring?

• Chromosome

• Gene

• DNA

• Protein

What is the main function of the digestive system?

• To circulate blood throughout the body

• To break down food and absorb nutrients

• To send signals to different parts of the body

• To remove waste products from the body

Biology is the study of?

• matter

• chemicals

• forces in nature

• life

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