What is the next step in the process after a substrate enters the active site of an enzyme?

What kinds of factors regulate a cell's progress through the cell cycle?

When an atom that has no charge loses two electrons, it becomes a

The units that determine the inheritance of biological characteristics

Viruses do not possess all the characteristics of life. Identify those characteristics that viruses display and those they don't display.

Define neurotransmitters

What is an atom in the human body

Explain the process that creates wind?

What type of food molecules make up lettuce

The theory of endosymbiosis suggests that the ancestors of mitochondria were A) formed due an error in cytokinesis. B) once free-living heterotrophic prokaryotic cells. C) parasitic cells that lived within more complex organisms.

Wat biotic and abiotic factors control viral activity in the sea