Which of the following statements is FALSE?
A) When plant cells are growing, they release expansins, which are enzymes that can expand the primary cell wall.
B) The secondary cell wall often contains structural components, like lignin, that form a relatively rigid and complex network within the cell wall.
C) A plant cell continues growing after the secondary cell wall forms but stops growing with the formation of the tertiary cell wall.
D) Pectin is a component of the cell wall that attracts and holds water.
Answer: C
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A bloodstream infection with ____________________ could result in the release of endotoxin into the bloodstream.
A) Clostridium difficile or Clostridium perfringens B) Neisseria gonorrhoeae or Escherichia coli C) Staphylococcus aureus or Mycobacterium tuberculosis D) Staphylococcus aureus or Streptococcus pyogenes
Which of these statements is false concerning
covalent bonds? a. Atoms share electrons. b. Molecules may possess many covalent bonds. c. Water contains polar covalent bonds. d. Covalent bonds may be "double bonds." e. In polar covalent bonds, electrons are shared equally
Which of the following does not normally move to any great extent from the blood into the filtrate at the renal corpuscle?
A) plasma proteins B) water C) hydrogen ions D) urea
The term "protist" is used to refer to a eukaryote that is not a plant, animal, or fungus.
Answer the following statement true (T) or false (F)