I think it is keystone. If they were not there the population of urchins would go up and the kelp would go down.
I think it depends on what it is about.. Did your teacher give you a punnett square or anything like that?
Answer
Bacteria that obtain its carbon from carbon dioxide (inorganic source) and its energy from complex carbon is known as chemotherapeutic bacteria. and the type mention in the above statement is known as chemolithoautotrophs.
The 3rd,4th, and 5th are correct.
If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with many, broad leaves. This helps to get more sunlight. The correct answer is C, many, broad leaves.
