Teleost fishes deal with the osmotic stress of living in seawater in part by
a. active transport of ions into the body through the gills.
b. excreting nitrogenous wastes through their kidneys as urea.
c. active transport of ions out of the body by chloride cells.
d. excreting excess salt through the actions of specialized salt glands in their heads.
e. maintaining high levels of urea and trimethylamine oxide in body fluids.
A
You might also like to view...
A given organism has 46 chromosomes in its karyotype. Therefore, we can conclude that it must _____
A) be human B) be an animal C) reproduce sexually D) have gametes with 23 chromosomes
Male Mormon crickets choose larger females as their mates. Which of the following statements best interprets the graph? 
A. Larger females lay more eggs. B. Larger females live longer and thus produce more eggs. C. Larger females reproduce earlier than smaller females. D. Larger females are capable of storing sperm. E. Larger females defend themselves better.
Which of the following is TRUE of spirochetes?
A. they are peritrichous. B. they are Gram-positive. C. they are able to penetrate a host's tissues. D. they are obligate intracellular organisms. E. they are pleomorphic.
Which of the following are adaptations for terrestrial life seen in plants?
A. Cell walls of cellulose and lignin B. Chlorophylls a and b C. Cuticle and stomata D. Vascular tissue E. Sporopollenin and an embryo protected and nourished by the parent plant