Amino acids are needed to build ________, just as ________ are needed to create DNA.

A pond ecosystem includes small water fleas which feed on submerged aquatic plants. When the water fleas die, they sink to the bottom of the pond where their dead bodies are broken down with the help of bacteria. List in order the producer, decomposer, and consumer in this system.

Which of the following determines the ability of atoms to bind with other atoms?   The number of 

Molecules that do NOT dissolve in water very easily are characteristically

Which of the following types of molecules contain the most energy per gram?

A particle in the atom that has neither a negative nor a positive electrical charge is the

A protein that has had its physical and chemical properties changed is said to be

If two organisms look completely different but you suspect they may be related, which of the following would be the most useful information to have?

Simon uses pesticides to minimize damage from pests in his garden.  After a few years of using the same pesticide spray, he notices that it has become less effective. This is most likely due to

Which of the following would be considered the most common element (by weight)  in living things?