Cutting down trees in the forest to make furniture because trees produce oxygen
Particle size of soil and aeration capacity play important roles in plant growth
Water accounts for most of a cell's mass!
Answer:
B.secrete hormones directly into the bloodstream
Answer:
Control group remains unchanged.
Explanation:
For example if you are trying to see if watering plants with Pepsi is better.
Your experiment plant would get watered with Pepsi.
Your control plant would get watered with water. (Control groups serve as a reference to compare in the experiment)
