What is the difference between commensalism and parasitism

Would competition increase or decrease genetic variation? Or could it both increase and decrease?

Genes are found on A chromosomes. B ribosomes. C mitochondria. D none of the above

What kind of growth involves roots and shoots but not reproductive structures and occurs in most plants?

Over the past two centuries, how has the growth of human population changed

It is important that classification principles be standardized in order for all scientists to follow the same set of rules. An example of this is A) the use of Latin. B) the adherence to Medieval categories.

If earth didn't rotate what would be one major obstacle life would have to overcome

Ferns get oxygen from what?

Is a cell or organ that secretes substances for use elsewhere in the body?

Are proteins, lipids, starch, sugar, calcium (ion), iron (ion), and chlorine (ion) found in blood plasma? If they are explain its function in the body.

Where does the chemical energy released in a chemical reaction come from?