Which animals are typically osmoconformers?

a. freshwater teleost fishes
b. sharks
c. birds
d. marine teleost fishes
e. freshwater invertebrates


ANSWER: b

Biology & Microbiology

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Radioactive isotopes have ____

a. excess electrons b. excess protons c. excess neutrons d. insufficient neutrons e. insufficient protons

Biology & Microbiology

Enzymes that are regulated by molecules that bind somewhere other than the active site are called ______

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The two domains composed of only unicellular organisms are

a. eubacteria and archaea b. eukarya and bacteria c. archaea and bacteria d. archaea and eukarya

Biology & Microbiology

Researchers have proposed that the herpes virus responsible for the childhood illness roseola may cause a type of T cell leukemia. Ninety percent of the population has been infected by the virus by two years of age, but the T cell leukemia is relatively

rare. The virus can be cultured in the laboratory in tissue culture, but not in mature organisms. Discuss the obstacles to applying Koch's postulates to the etiology of this disease. What will be an ideal response?

Biology & Microbiology