What is the function of the cell wall?
A. To provide the stiffness needed
B. To help maintain the shape of the cell
C. To provide protection for the cell
D. All of the above are functions of the cell wall
Answer: D
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Diffusion of water through a semipermeable membrane is called ________.
A. endocytosis B. active transport C. osmosis D. facilitated diffusion E. diffusion
Which phylum is strictly marine with no freshwater
or terrestrial forms? a. Echinodermata b. Platyhelminthes c. Cnidaria d. Mollusca e. Annelida
Antimicrobial peptides produced by normal flora are known as
A) hydroperoxides B) Defensins C) Histamine D) Bacteriocins
The atomic mass of an atom is the sum of the masses of the ________
a. electrons only b. protons only c. protons, neutrons, and electrons d. protons and electrons