Is it true that Cells are the basics for all living things

Synapses ... a) are found only in the central nervous system b) carry electrical signals along the length of an axon c) are gaps between neurons where chemical signals are used to transmit information d) allow electrical signal to jump between

The rapid speciation of mammals as a result of the availability of new habitat due to the extinction of the dinosaurs 65 million years ago is an example of: adaptive radiation. sympatric speciation. genetic drift. convergent evolution.

When the air inside a hot air balloon is heated, it expands and takes up a larger volume. As a result, it floats higher into the sky. What else happens to the air inside the balloon as it is heated? a Density decreases. b Density increases.

What are 2 microorganisms

How does continental drift and the theory of plate tectonics relate to pangea

After a hypothesis has been repeatedly tested and becomes widely accepted, it is considered a

The root of the tooth is held by the periodontal ligament a. True b. Falsee

At the center of the Andromeda galaxy is a source of x rays that scientist believe is a black hole with how many more times than the sun

True or false? The more similar two organisms are, the more distant their common ancestor is.

The blood-brain barrier a. is fully developed in humans when they are born. b. prevents many drugs from entering the brain. c. is designed to allow all drug compounds into the brain. d. cannot be penetrated, even with trauma to the brain.