Amphibian and most reptiles have
a. a two-chambered heart with two blood flow
circuits.
b. a three-chambered heart with two blood
flow circuits.
c. a four-chambered heart with two blood
flow circuits.
d. a three-chambered heart with one blood
flow circuit.
e. a two-chambered heart with one blood flow
circuit.
B
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The epithelial cells in the skin of an animal have 24 chromosomes. How many chromosomes are present in the gametes of this animal?
A. 6 B. 12 C. 24 D. 48
If a living plant cell is placed in a beaker with pure water, it will take up water until
a. within the cell ?P = ??S. b. it bursts. c. its ?P = 0. d. its ?S = ?S of the pure water. e. its ?S = 0.
What is NOT a characteristic of radiolarians?
A. They have perforated shells of calcium carbonate. B. They form part of the plankton. C. They have two cytoplasmic layers. D. They have vacuoles that impart buoyancy. E. They are heterotrophic protists.
Group A streptococci are considered more virulent if their cytoplasmic membrane contains M protein
Indicate whether the statement is true or false