Answer:
Independent Variable: Time each plant is exposed to daylight.
Dependent Variable: Hours of exposure
Constant Variables: Species of plant, location of each plant, amount of soil, amount of water, and tempurature.
Explanation:
Independent variable: the variable that stays the same.
Dependent: the measurement that is used to measure the independent variable.
Constant: the variables that stay the same in a experiment.

your answer is given below..
The environment is rich in infectious agents that transmit disease through pathogens.
The main determinant of skin color is melanin
Answer:
the evolutionary time between two nodes
Explanation:
Branch lengths indicate genetic change i.e. the longer the branch, the more genetic change (or divergence) has occurred
Basically it will just regenerate its body and continue being a starfish no matter how much you cut from a starfish it will regenerate