Which one of the following is the best definition of diffusion?
A. the tendency of molecules to move in
space due to kinetic energy
B. the movement of substances from an area
of high concentration to an area of low
concentration
C. the movement of a substance across a
membrane
D. the movement of a substance by osmosis
A
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Which fungal phylum has the fewest known living species even though they collectively make up
roughly half of the fungi in the soil?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
In correct order, the three stages of translation are
a. initiation, replication, and termination. b. elongation, peptide bond formation, and codonanticodon pairing. c. initiation, elongation, and termination. d. termination, initiation, and replication. e. none of these.
Which of the following is involved in the RNA sequencing process?
A. direct sequencing of RNA molecules B. extraction of DNA from a cell C. isolation of RNA from a cell followed by fragmentation of RNA D. generation of RNA from cDNA sequences E. conversion of the RNA to complementary DNA (cDNA) sequences
Most of the zooplankton and phyoplankton in a lake will be located in the
A. photic zone. B. produndal zone. C. benthic zone. D. littoral zone. E. Plankton will be distributed among each of these zones.