Auxin is the molecule which is related to the phototropism of the plants. In the mutant plants, which do not have hormone auxin, do not respond to light. It activates proton pump, and leads to the decrease in the pH of the leaf. This acidification breaks cell wall structure and cell wall become less rigid, and thus, can bend towards the light, by exerting mechanical pressure.
Answer:
Frog forelimbs are typically short as the hind limbs are the principal limb pair generating propulsion.
Answer:
The answer is D.
Explanation:
This picture above shows the image of a <em>barred spiral galaxy</em>.
It is from Google.
The answer is B :),this sentence has to be longer LOL
