Both marine fish and marine mammals have body fluids with a lower salt concentration. However, unlike fish, marine mammals do not drink seawater, although they do swallow some with their food. How are marine mammals able to maintain their internal supply of water?
What will be an ideal response?
Marine mammals have very efficient kidneys, and need very little water to excrete urea and salts in the urine.
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The HOBBIT gene in an embryo helps to control the development of what structure?
A. cotyledon B. endosperm C. root D. epicotyl E. root hair
As a result of an accident, a patient has their jaw wired shut and is put on a liquid diet. Why has the person been placed on a liquid diet?
A. Mechanical digestion would be inhibited since the jaws could not drive the breakdown of food by teeth. B. The secretion of amylase would be inhibited since muscles could not work. C. Peristalsis would stop. D. Lipase would not be added to food. E. None of the answer choices is correct.
Which organelle performs photosynthesis?
A) chloroplast B) Golgi apparatus C) lysosome D) mitochondrion
You could increase the amount of product produced over a given amount of time in an enzyme-mediated reaction by
A. adding ice. B. adding an inhibitor. C. adding more enzyme. D. boiling the enzyme.