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The _____ charge of a proton is exactly balanced by the _____ charge of a(an) _____ A. Negative; positive; electron B. Positive; neutral; neutron C. Positive; negative; electron D. Neutral; negative; electron

. The major functions of the plasma membrane do NOT include A. separation of the fluid environments inside and outside the cell.B. regulation of molecules and ions that pass into and out of the cell.C. recognition and communication between different cells and tissues.D. maintaining connections between adjacent cells.E. production of proteins used in construction of the cell wall.

Which organic compound is not only responsible for energy storage, but also can provide thermal insulation?a. lipidsb. proteinsc. nucleic acidsd. carbohydratese. monosaccharides

Microfilaments such as actin, microtubules, and the intermediate filaments form the cell-supporting structure called the ______________. A. cytoplasm B. plasma membrane C. cytoskeleton D. centrioles

A substance that acts as a reservoir for H+ ions, opposing any increase or decrease in concentration, is a(n) _______. A.buffer B.acid C.base D.antacid

What type of bonding is likely to occur between two water molecules or strands of DNA? A. covalent B. ionic C. hydrogen D. both hydrogen and covalent E. both hydrogen and ionic

. ____ is a cell engulfing large solid materials, and ____ is a cell engulfing materials dissolved in solution. A. Endocytosis; exocytosisB. Exocytosis; endocytosisC. Phagocytosis; pinocytosisD. Pinocytosis; phagocytosis

In a thunderstorm, the falling rain creates

Serous membranes _______,

What causes hair to stand on end?