What is the biggest danger of uv rays from the sun?
a. sunburn
b. heatstroke
c. skin cancer
d. ozone damage

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis