What is Nitrogen converted to in order to be useful to plants?

The final electron acceptor at the end of cellular respiration is a. hydrogen. b. ATP synthase. c. water. d. oxygen.

A scientist observing a group of spider monkeys noticed that the adult females often spend time picking leaves off of tree branches. The scientist hypothesizes that this behavior is caused by boredom. Is the scientist's hypothesis valid? A.

List the five conditions that can disturb genetic equilibrium in a population open study

What type of waste products may be discharged into U. S. waters?

Which arrow represents the change of state described above? The diagram shows changes of state between solid, liquid, and gas. The atoms of a substance gain energy during a change of state.

Our ability to oxygenate the tissues and organs of our bodies depends on our ability to ventilate, or exchange gases in our respiratory system. The resultant distribution of ventilation in our respiratory system depends on what factors?

Most materials are not magnetic because a. they lack magnetic fields. b. their magnetism has worn off. c. their magnetic domains are arranged randomly. d. Earth's heat has destroyed their magnetism.

The functional unit of the kidney is the.

What blood vessel type transports blood away from the heart?

Carbohydrates and fat both a. Can be used as an energy source by organisms b. Can be bonded together to construct DNA molecules c. Are made up of the glucose monomer d. Are monomers that can be made into large polymer chains