Anything that causes a reaction or change in an organisms or any part of an organism

Water on Earth is billions of years old. True or False?

Missy spencer was given penicillin for tonsillitis. she developed a severe life-threatening allergic (hypersensitivity) reaction to the penicillin. her medical file records this reaction as a (n) :

What are two ways that organisms are connected to the nonliving enviroment

This is the evaluation of scientific research, creative work, or performance by other people in the same field in order to maintain or enhance the quality of the work or performance in that field

What is a Cellular respiration?

Summarize how movements of tectonic plates have influenced climate and life on earth

What are the three types of chemical bonds

In a pond, algae has 10,000 kcal of available energy. If the zooplankton which consumes the algae has 1,000 kcal of available energy, what is the available energy to the minnows that consume the zooplankton?

Why are the symptoms of vascular neurocognitive disorder so different in each patient?

A mutation in a dna molecule is passed to offspring only when the mutation occurs in a