1. What would happen if a person fell into a black hole?
2. Why it takes more genes to make a tomato than a human.
3. How the placebo effect works.
Acid rain, if I understand the question correctly.
symbiosis in which one of the symbiotic organisms lives inside the other
Tropism is defined as the propensity of a plant to direct itself away (negative tropism) or towards (positive tropism) the stimuli. Plants that bend their roots towards a more humid environment exhibits positive hydrotropism as humidity is related to the water content of the environment.
<em>Gravitropism and geotropism have the same definition wherein plants move towards or away from gravity.</em>
