Which of the following is a biotic factor in the prairie ecosystem?

Consumers that can eat both plants and animals are called

According to the Food Guide Pyramid, which group should be eaten in very limited amounts?

Needed substances are carried to the body cells by

The place where an organism lives that provides the things the organism needs is called its

If a kestrel eats a mouse that eats grass, the kestrel is a

Which of the following is NOT a function of the digestive system?

The function of the atria is to

The smallest unit of ecological organization is a single

The many overlapping food chains in an ecosystem make up a(n)

What substance must be present in the stomach for pepsin to work best?

Blood vessels that carry blood away from the heart are called

Which of the following is an example of a population?

A diagram that shows the amount of energy that moves from one feeding level to another in a food web is called

The Food Guide Pyramid indicates how many servings from each food group should be eaten

In which vessels are materials exchanged between the blood and the body cells

Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is called

In which process do molecules of liquid water absorb energy and change into the gas state?

A calorie is a unit used to measure

What causes blood pressure

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