Which of the following is NOT a densitydependent,
growth-limiting factor?
a. pathogens
b. parasitism
c. drought
d. competition
e. species interaction
C
You might also like to view...
Which of the following is true regarding proto-oncogenes?
a. They are positive cell-cycle regulators. b. They are negative cell-cycle regulators. c. They are down-regulators of the cell cycle. d. They play no role in the cell cycle.
As an animal gets larger, which of the following occurs?
A. Its surface area grows more rapidly than its volume B. Its volume grows more rapidly than its surface area C. Its volume and surface area increase in proportion to each other D. Its volume increases, but its total surface area decreases
Transcription is initiated when
A. initiation factors assemble ribosomal subunits, mRNA, and initiator tRNA B. RNA polymerase comes to a stop sequence C. RNA polymerase binds to a region of DNA called the promoter D. new nucleotides are added to an existing strand of nucleotides
What evidence contributed to the formulation of the RNA-first hypothesis?
A. More primitive cells, such as archaea, use an RNA only information system. B. RNA continues to evolve chemically today. C. Protocells contain only RNA and lipids. D. RNA was formed in MIller's experiment. E. RNA can sometimes be both a substrate and an enzyme during RNA processing.