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RELEASED

In an ecosystem, which is the most likely reason for an increase in the producer population if there is an increase in the carnivore population?

A

fewer herbivores

B

higher temperatures

C

less food

D

more oxygen

What is the main function of leaves?

A

Leaves provide support for growth and a place to store food.

B

Leaves provide a place for photosynthesis to occur.

C

Leaves absorb water and minerals and transport nutrients to the stem.

D

Leaves create a barrier that prevents water in the plant’s tissues from evaporating.

37.

After an initial infection, B-cells recognize the measles virus. How is this helpful in human immune response?

A

The B-cells use this recognition to defend the body against other pathogens, such as bacteria.

B

The B-cells more quickly recognize and respond to any other virus that invades the body.

C

The B-cells produce antibodies more quickly if the measles virus is encountered again.

D

The B-cells transfer this recognition to T-cells, which will then devour the viruses.

NCDPI

36.

38.

North Carolina Test of Biology. Form I RELEASED Fall 2009

Page 18

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