Is a virus simple or complex?

What is a second messenger? A. A substance that reacts with a first messenger. B. A small substance generated in response to receptor binding that activate or inactivate specific proteins. C. A substance that reacts with a hormone or other ligand D.

The five distant planets are made mostly of

The graph demonstrates the quantitative variation for skin pigmentation. which conclusion is supported by the graph? a) more than half of the population has the central skin pigmentation.

Why adaptation is important in biology?

Which of the following is not an advantage of using the metric system

A lunar eclipse occurs when the moon casts a shadow on earth true or false

During the last century, both global temperatures and men's average height have increased. Do these correlated trends mean that the increase in men's height caused the increase in global temperature? yes ___ no ___ Explain why or why not.

Describe the different types of fossil fuels. What makes them nonrenewable?

As the number of rabbits in a community goes up, the number of foxes in the same community goes up. What type of relationship is this?

Which of the following locations would most likely have the most fertile soil