Wich term describes a pure substance thaf is made up of only one type of atom

Which one should I choose? Choice 1) A scientist asked to give a press release about the biotechnology topic you chose. Choice 2) A journalist reporting on the biotechnology topic you chose.

How does a virus reproduce?

Which part of the cell functions as a system boundary?

What is your familiarity with the terms infrared and ultraviolet? What uses and/or risks do they pose to humans?

Atp is being used to move the molecules out of the cell by

Many Head Start programs have a community aide who A. tutors at-risk children in the home. B. gives families the money they need to survive. C. connects families to community resources they need. D. represents families at family/teacher conferences.

Stranded on an island, you have two sources of water to drink: salty ocean water and contaminated fresh water. explain your choice of drinking water and indicate why your selection is the best choice.

How are a hypothesis a prediction and an experiment related

Two species of garter snakes live in the same geographic area. One lives mainly in water and the other mainly on land; therefore, they rarely encounter each other and do not interbreed. What type of isolation is this?

Matter that has a definite column but no definite shape is a