The stems of horsetails contain:

A. spores

B. utensils

C. silica

How does a food chain model energy flow?

In pea plants, round peas (R) are dominant to wrinkled peas (are). You do a test cross between a pea plant with wrinkled peas (genotype rr) and a plant of unknown genotype that has round peas. You end up with three plants, all which have round peas.

a person is fishing in a bay when low tides occurs, stranding the person in the boat. Approximately how long will this person have to sit in the boat until the next high tide occurs and the person can leave the bay

Why are the ventricles of the heart so much larger than the atria of the heart? A) The ventricles receive blood from the rest of the body B) The atria only receive blood and the ventricles have to pump blood to the lungs or the rest of the body C)

How is the phosphorus cycle different from other biogeochemical cycles?

Define sexual reproduction

A decrease in seawater temperatures or an increase in salinity causes A. Upwelling along tropical coast. B. an increase in seawater density. C. the circulation of ocean gyres D. a decrease in seawater density.

What is the difinition of biochemistry?

Why is respiration important for living organisms?

The soil in a flower pot, the amount of water added to the pot, the amount of sunlight received by the plant, the amount and type of fertilizer given, and the temperature of the air surrounding the pot all make up the plant's a. ecosystems b.