Many of the enzymes found in virus particles are
A. involved in viral entry into host cells.
B. involved in the replication of viral nucleic acid.
C. required for viral attachment to host cells.
D. All of the choices are correct.
Answer: B
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Which concept reflects the increasing numbers of species present in an area that includes a wide variety of habitats,
vegetation types, and small-scale environments?
a. landscape ecology b. the species-area relationship c. conservation biology
d. alpha-diversity e. beta-diversity
Insects are currently thought to have evolved from
a. myriapods. b. animals. c. algae. d. crustaceans. e. all of these.
Which of the following statements about the cancer-causing BRCA1 allele is FALSE?
A. It has evolved under strong negative selection in humans B. Possession of the allele results in a greater than 50% chance of developing breast cancer C. The dN/dS >1 D. One likely hypothesis for its presence is that also is important in combating viral infections
In the Fite method, the organisms stain:
a) red b) blue c) green d) black