Which class of molecules is responsible for speeding up chemical reactions

A catalyst for reaction in living things is

Explain why cold blooded organisms like reptiles have a higher rate of secondary productivity than warm blooded mammals

Living creatures which can be seen only by using a microscope are called Organisms microorganisms microbes

Which statement is true about light when it slows down upon entering another medium? A. Light burns more and there is greater refraction B. Light bends more and there is less re-fraction C. Light bends less and there is greater refraction D.

A skull from the genus homo that dates

In two or more complete sentences describe how a dam placed in a river can act as both a constructive and destructive force.

When enough experimental data support a hypothesis, the hypothesis becomes a what

Which part of the central nervous system is used to serve as the main communications link between the body and the brain

Examine the following diagram. Place the labeled layers in order from oldest to youngest.

What is the function of lateral meristem