Unique features of the planctomycetes include ________.
A. a membrane-bound nuclear region
B. resistance to ionizing radiation
C. their size: some are as large as protozoa
D. twitching fimbriae that are required for motility
Answer: A
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Which of the following is a density-dependent
factor that would control the size of a population?
a. wind velocity b. light intensity c. resource availability d. rainfall e. wave action in an intertidal zone
Methylation
a. suppresses gene expression. b. slows transcription. c. increases the rate of translation. d. inhibits the activity of RNA polymerase. e. activates introns
Which of the following is NOT TRUE of
photolysis? a. It is a function of the cyclic pathway. b. It involves photosystem II. c. It occurs in the light-dependent reactions. d. It is the source of oxygen in photosynthesis. e. It directly replaces electrons lost by p680
From an evolutionary perspective, true nerve cells are first seen in the phylum:A
Porifera. B. Cnidaria. C. Ctenophora. D. Mollusca. E. Arthropoda