Which type of organism is responsible for performing the majority of nitrogen fixation ... ?

A. Humans

B. Aquatic organisms

C. Plants

D. Bacteria

Which situation most likely involves the hormone gibberellin? the onset of winter dormancy the response of a plant to gravity the growth of top-located buds the development of new seedlings

What happens when an essential amino acid is missing from the diet

Natural selection will allow an organism to live long enough to reproduce, thus passing down the successful trait. a. true b. false

What is the similarity between mid-ocean ridges and accretion? A. Both occur at convergent boundaries B. Both occur at divergent plate boundaries C. They occur when plates slide past each other D. They occur when one plate is pushed below another

Can a person with a genetic disorder that has been corrected by gene transfer pass the corrected condition to his or her children? Why?

Cardiovascular disease has long been an epidemic in our country but not in some european countries, even though they have a diet high in fat, alcohol, and many of them smoke (the french being the best example).

How do mutations allow for viruses to become more widespread?

Which of the following is the female reproductive structure of the flower? A-anther B-pollen grain C-sepal D-carpel

A cow's herbivorous diet indicates that it is a (n

What will happen if Richard's friend jumps in front of him and scares him? Richard's central nervous system will take over, and his peripheral nervous system will have a lesser role.