Viruses are composed of only
a. proteins.
b. carbohydrates and proteins.
c. proteins and nucleic acids.
d. nucleic acids.
e. carbohydrates, proteins, lipids, and nucleic acids.
C
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Which of these are spore-producing structures?
A) sporophyte (capsule) of a moss B) antheridium of a moss or fern C) archegonium of a moss or fern D) gametophyte of a moss
Which of the following is not used to culture viruses?
A. Growth in embryonated hen's eggs B. Growth in whole animals C. Growth on artificial media D. Growth in cell cultures
In ________ the gametophyte is more obvious than the sporophyte
A) conifers B) mosses C) grasses D) ferns
Which of the following statements apply to freshwater fish?
A) They lose water by osmosis. B) The concentration of solutes in their internal fluids is lower than in the surrounding water. C) They pump out ions via the gills. D) They produce dilute urine.