How many germ layers do flatworms have?

Do cat's go into heat?

If it takes 27.3 days for the moon to make 1 revolution around the Earth, why does it take a total of 29.5 days to complete 1 set of phases?

If a sample tests positive for glucose what can be assumed about the enzymes activity

You can develop adaptations if the environment changes. True or False

What is an atom? A. The smallest unit of matter. B. The largest unit of matter. C. A particle that has a negative charge. D. A participle that has a positive charge.

True or false? bupropion is an antidepressant medication that is useful as a smoking cessation aid.

A new island forms due to an underwater volcano. Birds from the mainland colonized the island. This is an example of a. Behavioral isolation b. Reproductive isolation c. Geographic isolation

What is the differences between prokaryotic and eukaryotic ... ?

A finger-like projection of the cell membrane and cytoplasm use to catch food and/or move (false-foot)

Who was one of the first scientist to use numbers to look for patterns in experimental data