What are the symptoms of myxedema?
A. an eye that protrudes from the eye socket
B. lethargy, weight gain, puffiness
C. difficulty with speech, blurred vision
D. a mass in the throat
E. tremors in the hands, shaking, balance difficulties
Answer: B
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Which of the following statements about osmoconformers is false?
A. They do not have to adapt to the solute concentrations in the external environment. B. Their internal osmotic pressure matches that of the surrounding environment. C. They often actively regulate the concentrations of particular ions in their body fluids. D. They use less energy to regulate osmotic pressure than osmoregulators. E. Most marine invertebrates are osmoconformers.
Which of the following is a mechanism by which new susceptible individuals enter a population?
A. Birth of new individuals B. Migration of individuals into the population C. Birth of new individuals and migration of individuals into the population D. Enhancement of immune systems through immunization
If blood donor type “Z” is Rh+ and first-time blood
recipient “Z” is Rh-, __________ and __________ will result. a. no agglutination; Rh antibody formation b. no agglutination; no Rh antibody formation c. agglutination; Rh antibody formation d. agglutination; no Rh antibody formation e. none of these
Answer the following statement(s) true (T) or false (F)
1. Ultimately all organisms are dependant on photosynthesis for their food. 2. Recent scientific data shows that an increase in atmospheric carbon dioxide levels leads to an increase in photosynthesis and therefore an increase in food production. 3. Being very specific, the actual end product of photosynthesis is RuBisCO.