The productivity of an ecosystem
A. can be measured in biomass produced.
B. can change depending on the stage of succession.
C. is dependent on such abiotic factors as; temperature, water, and sunlight.
D. All of these answers are true.
D. All of these answers are true.
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Imagine that you have sequenced the genome of a human pathogenic bacterium. In the early stages of analysis, you discover a stretch of DNA that has a significantly different GC content (the proportion of bases that are G and C)
Further examination of this region shows there are roughly one dozen protein-coding regions. These are not found in the genome of a previously sequenced and related nonpathogenic bacterium. These sequences do, however, predict protein products strikingly similar to those of another bacterial pathogen that is not closely related to the organism you are studying. You immediately suspect _____. A) neutral evolution B) that both sequences are introns C) a high rate of mutation D) a low rate of mutation E) lateral gene transfer
Wilkins and Franklin studied the structure of DNA using ____
a. molecular scale models of nucleotides b. X-ray diffraction c. computer-assisted graphics d. electron microscopy e. light microscopy
Glycogen is a polysaccharide used for energy
storage by a. animals. b. plants. c. protistans. d. bacteria. e. archaea.
The oxygen given off by photosynthesis comes from
a. H2O. b. glucose. c. CO2. d. RuBP.