Which of the following is NOT a function of the eukaryotic cytoskeleton?
A. anchors organelles
B. gives shape to the cell
C. packages cellular secretions
D. performs endocytosis
E. aids in contraction of the cell
Answer: C
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Rosalind Franklin's research contribution was
essential in
a. establishing the single-stranded nature of DNA. b. establishing the principle of base pairing. c. establishing most of the principal structural features of DNA. d. sequencing DNA molecules. e. determining the bonding energy of DNA molecules.
The osmotic potential of a plant refers to the
A) force exerted outward on a cell wall by the water contained in the cell. B) surfaces of larger molecules, such as those in the cell walls, exerting an attractive force on water. C) association between concentrations of solutes in cells and the rate of water loss. D) ratio of carbon fixed (photosynthesis) per unit of water lost (transpiration).
The best definition of population density is:
a. the number of individuals of all species in a given area. b. the number of individuals of one species in a given area. c. the number of individuals in a given area at a given time. d. the number of individuals of all species in a given area at a given time. e. the number of individuals of one species in a given area at a given time.
Cells that have a single set of chromosomes are said to have a _______ number of chromosomes; cells that contain two full sets of paired chromosomes are said to have a ______ number of chromosomes.
a) haploid, diploid b) haploid, haploid c) monoploid, polyploidy d) diploid, haploid e) diploid, diploid