Ammonia is released from dead plants by

(A) denitrifying bacteria.

(B) nitrogen-fixing bacteria.

(C) bacteria of decay.

(D) nitrifying bacteria.

(E) none of the above.

What compound directly provides energy for cellular work?

What part of the plant is the arthichokes?

Which type of fermentation does NOT give off carbon dioxide?

Every spring, each mature female fish of a particular species produces several million eggs. however, the total population of this species remains at around 10000 from one year to the next.

Which of the following explains the difference between a force caused by gravity and a force caused by friction? A Gravity is a force that resists a change in motion and friction is a force of opposing motion.

What are the two ultimate sources of energy for all the living things on Earth?

A plant cannot conduct light reactions if its cells do not contain?

An atom has a proton mass of 35, a neutron mass of 35, and an electron mass of 3. What is the estimated mass of the atom? A. 35 B. 70 C. 38 D. 73

Why are a variety of instruments needed to measure change in the climate system?

Give three examples of stimuli that your sensory receptors are responding