Chicken pox is usually only contracted once because:

A. It is not very contagious.

B. Antibodies remain in the body.

C. Antigens prevent the virus from attacking again.

D./None of the above.

What do DNA to RNA have in common? a) The base pairs adenine and uracil. b) Two strands of nucleotides. c) The base pairs adenine and guanine. d) A ribose sugar

Lipoproteins are spherical compounds in which fat clusters in the center and phospholipids and protein form the outside of the sphere. match the lipoprotein on the left with its source on the right.

A scientist finds a gene in the DNA of a wild-growing plant that could increase the amount of lycopene, a cancer-fighting agent, in grapefruits. The scientist inserts this gene into the DNA of a grapefruit plant.

Compare and contrast adaptation and response

Describe how the protection of an umbrella species can be beneficial to an ecosystem

Explain the characteristics of this soil sample that likely allowed Judy to make this identification. Include particle size and texture in your response.

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which functions of the air sampler confirm that it is an electronic tool? Check all that apply. It collects chemical data.

Prokaryotic cell lacks membrane - enclosed structure is called?

Humidity is water vapor in the air. Infer how plants contribute to humidity.

What type of catalysts affect biochemical reactions?