An organism at the top of the food chain:
A. has no natural prey
B. has no, or very few, natural predators
C. experiences no selection pressures
D. is not subject to evolutionary changes
B
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If a cell has a higher concentration of solutes than its surrounding environment, its tonicity is ________ in relation to the extracellular environment
Fill in the blank(s) with correct word
If you wanted to manufacture a fat, which one of the following would be necessary?
A. water B. amino acids C. vitamins D. glycerol
Cytokinesis in both plant and animal cells results in the formation of which of the following?
a) nuclear membranes b) spindle fibers c) two haploid cells d) centromeres e) two daughter cells
In humans, assume that brown eyes is dominant and blue eyes is recessive. If two brown-eyed individuals have a child with blue eyes, that means:
a. both parents are homozygous for brown eyes. b. both parents are heterozygous for eye color. c. there is a 1/4 chance that their second child will have brown eyes. d. there is a 50/50 chance that their second child will have blue eyes. e. None of the above.