Which of the following characterizes glomerular filtrate, the fluid that passes from the blood in the glomerulus into the tubule of the nephron?
A. It is clear in appearance and contains no glucose
B. It is a concentrated solution of waste produces
C. It is identical to blood plasma
D. It is blood plasma that lacks most proteins
E. It is whole blood
Ans: B. It is a concentrated solution of waste produces
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PC agar is a selective media for isolation of B. cepacia. What is the purpose of the polymixin B and ticarcillin in the media?
a. They provide nutrients to enrich the growth of B. cepacia. b. They cause color change in the media from yellow to pink. c. They inhibit growth of gram-positive and other gram-negative organisms. d. They stabilize the media to support growth if prolonged incubation is needed.
Whose findings of evolution by natural selection were presented with those of Darwin?
a. Alfred Wallace b. Carolus Linnaeus c. Charles Lyell d. Gregor Mendel e. Thomas Malthus
Chemoreceptors are involved with which two senses?
a. touch and olfaction b. hearing and olfaction c. gustation and touch d. gustation and vision e. gustation and olfaction
Vampire squid (Vampyroteuthisinfernalis) are deep-sea cephalopods with features similar to both octopus and squid. Extensive video recordings show the diet of the vampire squid consists of items like crustacean remains and fecal pellets. Which of the following terms describes the position of the vampire squid in the deep-sea trophic pyramid?
A. Primary producer B. Secondary carnivore C. Detritivore D. Herbivore E. Primary carnivore