Is it true that the plasma membrane is a single phospholipid layer that supports and protects a cell and controls what enters and leaves it

What two fields of study provide the core information that is used to classify organisms?

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.