Jellyfish were the first invertebrate animals in the earth's oceans? True False

With oxygen present, the Krebs cycle and the electron transport chain break down glucose to produce carbon dioxide, water, and ATP. produce most of the ATP needed for life. provide organisms an alternative to glycolysis. All of the above

Olfactory receptors are A) bipolar cells B) multipolar cells C) unipolar cells D) epithelial cells A A B B C C D D

What replaces peptidoglycan in Archaea cell walls? an S-layer organelles DNA amino acids

The SCN is known as the pacemaker because without it, we cannot estimate time accurately. True False

Which of the following tools do scientists use to cut DNAin genetic engineering? plasmids small knives DNA ligase proteases restriction enzymes