In sponges, spicules are secreted by ____
a. amoeboid cells
b. choanocytes
c. sperm cells
d. porocytes
e. pinacoderm
ANSWER: a
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Which of the following is INCORRECT for ethanol fermentation?
A. A source of organic sugar is required, for instance from malt. B. Results in a net production of NADH. C. Glucose is oxidized to pyruvate as one of the steps. D. Carbon dioxide and ATP are produced. E. NADH is used to reduce acetaldehyde to ethanol.
Cheetahs exhibit significant inbreeding and loss of heterozygosity due to overhunting and loss of habitat experienced at some point in their evolutionary history
Which genetic mechanism occurs when a large population is substantially reduced at random, acting independently of natural selection? A) founder effect B) mutation C) gene flow D) Hardy-Weinberg equilibrium E) bottleneck effect
The male part of a flower is the
A. petal. B. pistil. C. sepals. D. stamen.
Pentamidine is an example of an antimicrobial
A. used to treat bacterial infections. B. effective against helminths. C. used to treat viral infections. D. effective against eukaryotes, especially protozoa. E. used to treat both bacterial and fungal infections.