What is the main way that marine teleost fishes deal with the osmotic stress of living in seawater?
a. by active transport of ions out of the body by chloride cells
b. by excreting nitrogenous wastes through their kidneys as urea
c. by excreting excess salt through the actions of specialized salt glands in their heads
d. by active transport of ions into the body through the gills
Answer: a. by active transport of ions out of the body by chloride cells
You might also like to view...
Which of the following statements best compares the peduncle and receptacle?
A. The peduncle and receptacle are identical, merely two names for the same structure. B. The peduncle is haploid and the receptacle is diploid. C. The peduncle is a reproductive part of a flower and the receptacle is a vegetative part. D. The receptacle is the part of the flower that receives the pollen whereas the peduncle relays sperm to the ovule. E. The peduncle is the tip of the stem bearing the flower and the receptacle is the base of the flower.
In plants, phloem is associated with transport of:
a. water only. b. dissolved sugars. c. water and minerals. d. minerals only. e. plant hormones only.
Humans breathe in air that contains nitrogen, oxygen, carbon dioxide, and trace amounts of thousands of pollutants
Indicate whether the statement is true or false
The study of proteins using siRNA's is MOST useful in determining:
A) protein denaturation B) the DNA sequence that codes for a protein C) changes in protein composition within the cell over time D) the function of a protein E) protein structure