2. cam plants close their
during the day and open them at night.
a chloroplasts
b stomata
c thylakoids
d vascular bundles

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

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