Many polychaetes are euryhaline meaning that they
a. Can tolerate a wide range of salinity
b. Must live in marine conditions
c. Possess both male and female reproductive organs
d. Always live in tubes
e. Lack any circulatory system
Answer: a. Can tolerate a wide range of salinity
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What best describes the tunic of a tunicate?
A. It is made of chitin, like the shell of a crab. B. It is made of calcium carbonate, like the shell of a clam. C. It is made of keratin, like human hair. D. It is made of cellulose, like the cell wall of a plant.
Fomites are
A) insects that transmit pathogens from an infected host to a noninfected host. B) inanimate objects involved in the indirect contact transmission of pathogens. C) fecal material from infected hosts. D) animal sources for human pathogens. E) silent carriers of infectious diseases.
What is meant by homologous recombination?
What will be an ideal response?
Proteus species often cause urinary tract infections.
a. true b. false