The correct answer is catalyst. Hope that helps.
Answer:
A. to remove waste
Explanation:
The purpose of reproduction is to create offspring. Offspring will naturally carry the characteristics of the parents. When offspring are born they create the next generation and keep a species alive. The excretory system removes waste.
Convection is the heat transfer used in this transfer.
Answer:
Commonly, we think of a theory as a kind of guess or "hunch." In science, a theory is much more. A scientific theory is an explanation supported by a large amount of evidence.
Explanation:
Hope this helps- good luck! ^w
