The mucus cocoon of parrotfish is used as a means of:
a. masking the fish's scent.
b. discouraging parasites from attaching.
c. capturing plankton prey.
d. maintaining osmotic balance.
e. maintaining thermal constancy
A
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Which of the following groups is responsible for toxic red tides?
A. Foraminifera B. Diatoms C. Dinoflagellates D. Trypanosomes
Which organism is oxidase-negative, oxidizes glucose, and is a nonlactose fermenter?
a. Escherichia b. Pseudomonas c. Acinetobacter d. Moraxella
The inner compartment of mitochondria is called the
a. stroma. b. intermembrane space. c. inner membrane space. d. matrix.
Which of the following is evidence supporting the Lyon hypothesis of X inactivation?
A. A highly condensed structure is consistently observed in female cells, but not in normal male cells. B. Female mammals that are heterozygous for X-linked traits are phenotypic mosaics. C. A female cat that is homozygous for coat color cannot have a calico phenotype. D. Calico patterns of coat color are never exactly the same. E. All of the answers are correct.