Answer:
research question: how do different humidity levels affect the heights of different types of trees
independent variable: humidity level
dependent variable: tree height
constants: temperature, light, duration of time
control group: tree left outside in normal conditions
Explanation:
Answer:
C
Explanation:
If you have more than one variable then you wont know which variable caused the change. Hope this helped, if it did give it a thanks or whatever.
I am pretty sure that the thing which most likely happen to plants if they did not have a waxy outer coating is being revealed by the last option D. They would be harmed by insects and UV radiation. Every plant has to be protected by membrane so that it would be able to deal with drought small invaders and other external forces.
mostly collagen and some calcium phosphate
Answer:
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information.
