Constants are factors that are not changed in the experiment. Since the experiment is testing different colors of light on plant growth, light color is being changed, and is therefore not a constant. Hope this helps! :)
Answer: B, C and, D
It allows nutrients to enter the cell.
It provides a barrier against disease-causing agents.
It enables cells to interact with their environment.
Answer:
B.
Explanation:
The postvoid residual volume less than 50 mL is considered normal, and the volumes greater than 100 mL is generally considered abnormal
Answer: They would not be able to grow muscle without bacteria because bacteria is unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
Explanation: That is why.