A pH of 4 is __________ times more __________ than a pH of 7
a. 3; basic
b. 3; acidic
c. 1000; neutral
d. 1000; basic
e. 1000; acidic
E
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Measuring its costs and benefits in terms of energy spent and/or gained, which interaction(s) involve one individual gaining and one individual losing? Select all that apply
A. competition B. predation C. obligate mutalism D. facultative mutalism E. commensalism
In poultry, the genes for rose comb (R) and pea comb
(P) produce walnut whenever they occur together (R__ P__); single-combed individuals have the homozygous condition for both genes (rr pp). (a) Give the F1 and F2 phenotypic results of a cross of a pure-breeding rose comb (RR pp) with a pure-breeding pea comb (rr PP). (b) Give the phenotypic results of a cross of Rr Pp x rr Pp. (c) Give the phenotypic results of a cross of RR Pp x rr Pp. (d) Give the phenotypic results of a cross of Rr pp x rr Pp. (e) Give the phenotypic results of a cross of Rr Pp x rr pp. What will be an ideal response?
Which of the following kinds of organisms can manufacture the greatest variety of organic compounds?
A. aerobic bacteria B. anaerobic bacteria C. animals D. plants
As the global concentration of carbon dioxide increases, there is great potential for direct impact on the world's
A. climate. B. biogeochemistry. C. ozone layer. D. biodiversity.