Plants on the floor of a rain forest often have very dark green leaves. this coloration is due to the presence amounts of chlorophyll in the leaves, which is necessitated by the fact

Plants at the bottom of a rain forest are darker in color because they have larger amounts of chlorophyll. This is because it’s harder for them to collect sunlight, due to them being on the floor of a rain forest covered by lots of other plants.

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil. 

Aplant cell has vacuoles and a cell wall