Which population is more likely to be affected
by genetic drift?
a. 12 squirrels in a forest
b. 49 herons in a colony
c. 215 fleas on a dog
d. 1350 mice in a house
e. 3000 zebra in a herd
A
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What do the cell walls of plants and the extracellular matrix of animal cells have in common?
A) They are largely composed of phospholipids and glycoproteins. B) Their proteins are made by free cytoplasmic ribosomes. C) They form rigid structures that provide structural support for cells but limit their expansion. D) They limit the passage of small molecules. E) They have functional connections with the cytoskeleton inside the cell.
All of the following events occur during mitosis EXCEPT ____
a. alignment of chromosomes at the spindle midpoint b. disappearance of the nuclear envelope c. formation of the spindle d. DNA synthesis e. separation of sister chromatids
You take a dog's temperature at the rectal end of the large intestine. Which surface is this?
a. caudal b. ventral c. dorsal d. cephalic e. superior
The endoskeleton of an echinoderm is composed of
A) cellulose. B) silica. C) calcium carbonate. D) chitin. E) lignan.