Which of the following is a part of a water-based carbon cycle? A.) Trees
B.) Crab shells
C.) Human beings
D.) Coal-based power plants

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Which of the following is a testable hypotheses?