The air in the thermosphere is composed of atoms of that are very far apart from each other.

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Differentiation of cells changes the nucleic information. true false

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm