Need more biology help?

Which of the following is neither a physiological nor an anatomical adaptation for thermoregulation?

A) a shark's countercurrent heat exchanger retaining heat in the body

B) a human sweating on a hot day

C) a dog growing a thick winter coat

D) a marine iguana sunning itself on a rock

E) an elephant's loss of heat from its ears



Which of the following statements does not apply to saltwater fish?

A) They lose water by osmosis.

B) The concentration of solutes in their internal fluids is much lower than in the surrounding water.

C) They pump salt ions out through their gills.

D) They produce large amounts of diluted urine.

E) They drink a lot of seawater



Which of the following is not a function of the excretory system?

A) elimination of nitrogenous wastes

B) maintenance of salt balance

C) elimination of undigested foods

D) maintenance of water balance

E) production of urine
Need more biology help?
1. C. The other options are form of thermoregulation.

2. A. They never lose water via osmosis since the concentration gradient is absent. Remember that osmosis is dependent to the concentration gradient for transport.

3. C. This is an added function of the digestive system.
Reply:for 2nd question: i gues the answer would be "B" but im not shore...



http://64.233.167.104/search?q=cache:GUj...
Reply:Why not ask some people at http://www.scienceforums.net they know everything. BTW, what Year level questions are these?



Plz answer in "additional details".
Reply:D



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