Which strategies would a seawater fish with an internal osmolarity of 320mOsm/L living in a marine environment of 1010mOsm/L utilize to maintain internal ion and water homeostasis?
A. Produce copious amounts of dilute urine.
B. Drink seawater and actively excrete salts out of their bodies across the gills.
C. Don't drink seawater and actively transport salts into their bodies at the kidneys.
D. Drink seawater and actively transport salts into their bodies at the gills.
E. All of the choices for this question are correct.
B. Drink seawater and actively excrete salts out of their bodies across the gills.
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Which of the following is a function of RNA that is dependent on its three-dimensional structure?
A. catalytic role in translation and splicing B. transient carrier of genetic information C. carrier of amino acids to the site of protein synthesis D. information storage as double-stranded RNA helices in viral genomes E. All of these functions of RNA are dependent on its three-dimensional structure.
Which statement is true?
a. There is no danger involved in recombinant DNA research in humans. b. There is no danger involved in recombinant DNA research in bacteria. c. There is no danger in releasing recombinant organisms into the environment. d. Stringent safety rules make the use of recombinant DNA research possible. e. Stringent safety rules make the use of recombinant DNA research impossible.
Which statement does not apply to carbon dioxide?
a. It is released in the burning of fossil fuels. b. It contributes to ozone destruction. c. It is absorbed by plants. d. It contributes to global warming. e. It is increasing in abundance in the atmosphere.
Ferns, pines, and flowering plants all
A. produce pollen. B. have vascular tissue. C. produce seeds. D. All of the above are correct.