In the absence of O2, the partial metabolism of glucose in human muscles produces _________
a. acetaldehyde
b. carbon dioxide
c. energy
d. lactic acid
e. oxygen
D
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The process by which haploid cells are produced from diploid cells is called
A. sexual reproduction. B. mitosis. C. fertilization. D. meiosis. E. reduction.
A tracheophyte is a plant that has
a. xylem and phloem. b. a windpipe. c. a trachea. d. the gametophyte as its dominant generation.
Following intense exercise, the human body attempts to overcome oxygen debt by
A) sweating.
B) elevating heart rate.
C) producing ATP.
D) taking deep breaths.
E) inhibiting contractions of smooth muscle.
What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?
A. Failure of the cross-linking of the peptidoglycans B. Mutation in the variable surface glycoprotein genes C. Damage to the choanocytes D. A disruption of the cytoskeletal proteins