As food moves through the digestive tract it spends the most time in the:

A plant cell remains unchanged in shape or size when it is kept in a solution. What kind of solution is it? A) distilled water B) isotonic solution C) hypotonic solution D) hypertonic solution

Explain how temperature and precipitation are affected by latitude and the sun's rays.

Name a hormone secreted by the thyroid gland that acts to lower blood calcium

The male reproductive parts of a flower are called a. petals. b. stamens. c. sepals. d. carpels.

Which structure is directly responsible for the formation of proteins within the cell?

Which statement is correct about the total mass of glucose and oxygen formed during photosynthesis? It is equal to the total mass of carbon dioxide used. It is less than the total mass of carbon dioxide used.

If George is startled by a loud noise immediately after his baby sister cries, he is likely to become fearful every time she cries.

When the believer confesses his, he is cleansed by the blood of?

How does a vascular plant's phloem differ from its xylem? A. Phloem is found only in the leaves. B. Only phloem transports water. c. Only water flows through phloem. D. Phloem has a two-way flow of materials,

Many mutations have been identified in the lac operon. A particular mutation prevents the repressor protein from binding to the operator under all circumstances.