Answer:
B. the health of coral colonies
Explanation:
Answer:
running water smoothing out the rocks
Explanation:
Semipermeable means only certain substances can pass through. I imagine you are talking about cell membranes which are semipermeable. This means vital things like oxygen and nutrients are able to pass through the membrane, while not allowing everything to enter the cell
Englemann is the scientist who showed that plants use red and blue light in photosynthesis.
-Engelmann devised an experiment to learn which wavelengths (colors) of light were the most effective in carrying out photosynthesis in the green alga Spirogyra.
-He found that certain red and blue wavelengths of light are the most effective in photosynthesis because they have exactly the right amount of energy to energize, or excite, chlorophyll electrons and boost them out of their orbits to a higher energy level.