1) Which of the following statements provides the physiological basis for linking osmoregulation with excretion of nitrogenous wastes.
a) Ammonia and urea are released from the breakdown of amino acids in most excretory systems
b)There are specific transport proteins that reabsorb ammonia and urea in most excretory systems
c) Ammonia and urea are small molecules that are easily removed during filtation of the blood in most excretory systems
d) Ammonia and urea are solutes that contribute significantly to osmoregulation in most organisms
2) Terrestrial plants and animals are similar in that they bathe their cells in a fluid that is contained within the organism. Which of the following statements incorrectly describes some aspect of this fluid in plants?
a) The fluid that bathes plant cells is located in the apoplast
b)The osmolarity of the fluid that bathes plant cells inside the root endodermis is determined by ion transport into the root xylem
c) Plant cells can use their vacuoles as a temporary storage site for excess ions without having to "excrete" them
d)plants actively regulate the osmolarity of the fluid that bathes its cells
e) plants cells can tolerate much larger changes in the osmolarity of the bathing fluid than most animal cells
Thank you
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