Answer:
B. Gravitropism
Explanation:
I think because gravity makes the roots go down???
Autotrphs, vary in size, unicellular and multu celluar, come in many colors.
This will probably help you: https://quizlet.com/4965961/plant-like-protists-flash-cards/
the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms.
Muscles and tissue will not be able to grow properly.
