What fat is the building block for cell membranes?
a. trans fatty acids
b. sterols
c. phospholipids
d. triglycerides
e. cholesterol
ANSWER: c
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Which of the following lists cell types in order from those capable of differentiating into the greatest number of different specialized cells to those capable of differentiating into the least number of different specialized cells?
A. multipotent, pluripotent, totipotent B. pluripotent, totipotent, multipotent C. totipotent, multipotent, pluripotent D. totipotent, pluripotent, multipotent E. multipotent, totipotent, pluripotent
The main source of light in the deep sea is:
a. the sun. b. bioluminescence. c. underwater volcanoes. d. dinoflagellates. e. anglerfish.
If a food chain consisted of grass to rabbits to foxes, what weight of foxes could be expected in a meadow that has 10,000 pounds of grass?
a) 10,000 b) 2000 c) 10 d) 100,000 e) 100
Which of these events occurs during anaphase?
A) Sister chromatids become separate chromosomes. B) Chromosomes line up in the middle of the cell. C) The nuclear envelope reappears. D) The nuclear envelope breaks up.