What is a sugar phosphate backbone and how many dose a double helix have?

El Niño is best described by which of the following situations? unusually cool ocean temperatures unusually cool air temperatures unusually warm air temperatures unusually warm ocean temperatures

An imbalance from the homeostasis perspective is considered to be

What does the lac operon in bacteria code for?

Which one of these is not an example of intercellular communication? A molecule stimulates a target cell via a receptor. A message is distributed across plasma membrane. A message travels between gap junctions.

Should a virus be considered living or nonliving? This is for AP Biology and just want to hear some thoughts and explanations on why you think it should be one or another.

Amino acids with hydrophobic r groups are most often found buried in the interior of folded proteins. True or False.

Which division of the plant kingdom is made up of plants that have flowers or fruit? A.) Angiosperms B.) Gymnosperms C.) Nonvascular plants D.) Seedless vascular plants

explain how the elimination of a predator from a ecosystem might result in starvation amongst its prey speies

What organs function using the photereceptors

Suppose you didn't water a plant for two weeks. What do you expect the stomata would do