Some bacteria in the deep oceans use iron as an energy source to make carbohydrates from carbon dioxide. These
bacteria would be classified as ____.
a. chemoautotrophs
b. chemoheterotrophs
c. photoautotrophs
d. photoheterotrophs
e. decomposers
ANSWER: a
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Bacteria are good models to use because they
A. are large in size. B. share many biochemical/physiological properties with more complicated organisms. C. can be assembled into multicellular organisms. D. have complicated growth requirements.
Scramble competition results when all individuals in a population share the limited resources
____________________ Indicate whether the statement is true or false.
Place the following events of bacterial conjugation in order from first to last.1-DNA replication2-an enzyme joins F factor DNA ends3-sex pilus shortens4-DNA transfer5-an enzyme cuts F factor DNA
A. 5, 1, 3, 4, 2 B. 1, 2, 3, 4, 5 C. 3, 5, 4, 2, 1 D. 3, 5, 1, 2, 4 E. 3, 5, 1, 4, 2
Polar molecules are composed of covalently-bonded
A. ions. B. atoms of different electronegativity. C. identical atoms. D. atoms of identical electronegativity. E. carbon atoms.