Which nitrogen containing base is found in rna but not in dna?

Name the organ where gas exhange takes place

Describe one example of when an ecosystem can become unstable. Be sure to describe both the biotic and abiotic factors in your example for full credit

What are isotopes and why are they important?

Fatty acids with double bonds between some of their carbons are said to be

Which part of the skin contains blood vessels, nerves, and glands? dermis epidermis pores fatty layer

The part of the brain where planning, language and advanced thought occur is:the hippocampus. the amygdala. the cortex. the hypothalamus.

Which best explains the difference between a ball-and-stick model of a chemical compound and a space-filling model? Ball-and-stick models can show compounds in three dimensions, but space-filling models cannot.

Which of the following are not allowed on public land?

Prokaryotes that belong to the kingdom Eubacteria and carry out photosynthesis are called

Which law states that each planet revolves so that an imaginary line connecting it to the sun sweeps over equal areas in equal time intervals?