Over hunting and natural disasters can lead to

How many times do the cells divide in mitosis?

What is the third phase of mitosis? include a brief description

A community can eventually develop from bare rock into a stable mature community where there is little change in the composition of species. this maure community is called

Rick's class plans to study the effect of eating different breakfast foods on grades in morning classes. Students in the class will be the test subjects for the investigation.

Do scientists Know what is causing El Niño?

Which would provide the body with the most energy? a. Carrying oxygen from the lungs to the cells b. Breaking the bonds in a disaccharide c. Breaking a single carbon bond d. Creating bonds to make a simple sugar

When water changes from a liquid on Earth's surface to a gas in the atmosphere, this is known as transpiration condensation evaporation precipitation

The most famous pioner colonial times

Can a theory change over time? If so, how?

Which of the following needs a host to reproduce? 1) all of the above 2) eukaryotic cell 3) none of the above 4) prokaryotic cell 5) virus