In its non-phosphorylated state, the retinablastoma protein (Rb) binds to and inhibits the activity of:
A. cyclin D
B. the E2F transcription factor
C. cyclin-dependent kinase
D. p53
Ans: B. the E2F transcription factor
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The most common mode of reproduction in bacteria is:
a. binary fission. b. transformation. c. transduction. d. conjugation. e. mitosis.
The organisms most likely to undergo sympatric speciation by polyploidy are
A) birds. B) mammals. C) protists. D) insects. E) plants.
Equilibrial species are shaped by ____, and tend to have a ____.
A. K-selection; small body and short generation time B. r-selection; large body and long generation time C. K-selection; large body and long generation time D. r-selection; small body and long generation time E. r-selection; large body and short generation time
Atoms that have the same number of protons but differ in the number of neutrons are called ________
Fill in the blank(s) with correct word