Indeterminate cleavage takes place in ____ and is characterized by a pattern of development where the ultimate fate of
each cell is ____.
a. deuterostomes; not fixed until late in the developmental process
b. protostomes; not fixed until late in the developmental process
c. deuterostomes; fixed early in the developmental process
d. protostomes; fixed early in the developmental process
e. coelomates; fixed early in the developmental process
a
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The production of root hairs is mostly dependent on
A. auxin production. B. position of an epidermal cell. C. width of the root. D. length of the root. E. position of the root in the soil.
The first cells evolved approximately ________ years ago
a. 2.7 billion b. 2.2 billion c. 5 billion d. 3.8 billion e. 3.2 billion
Chromosome painting is a relatively new technique in karyotype analysis. Which one of the following
statements about chromosome painting is false? A. It is done to make abnormalities easier to detect. B. The dyes used to create color are fluorescent dyes. C. The dyes are attached to DNA sequences. D. In a normal karyotype, each chromosome appears with bands of different colors. E. Each of the 24 different chromosome types has a unique appearance.
All infectious diseases
A. are caused by microorganisms or their products. B. only occur in humans. C. involve viruses as the pathogen. D. are contagious. E. are caused by vectors.