An individual has been infected with a particular retrovirus. In order for the latent virus DNA to be inherited by subsequent generations stemming from this individual, it must be found
A) in germ line cells.
B) in stem cells.
C) at a point early in childhood.
D) in all cells simultaneously.
E) in somatic cells.
Answer: A
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How can selection cause two populations to become different with time?
What will be an ideal response?
The mature male gametophyte is indicated by
a. A. b. B. c. C. d. D. e. E.
Which of the following best explains why bacteria have the greatest biomass of any other plant or animal on earth?
a. Bacteria are able to live essentially anywhere—soil, air, water, ice, etc. b. Some bacteria can make their own food. c. Some bacteria can survive and thrive with or without oxygen. d. There is one dominant species of bacteria that has a greater molecular weight than other bacteria, accounting for the high biomass. e. The first three choices are correct.
Indicate which of the following mechanisms are used by carnivorous plants to trap or attract prey (check all that apply)
A. sticky mucilage. B. insertion of haustoria. C. traps that are activated by touch. D. pitchers with slippery walls that collect water.