Select the false statement:a
Biomass reduction from one trophic level to the next is approximately 50 %.
b. Biomass reduction from one trophic level to the next varies widely in nature.
c. Biomass reduction can be measured as dry weight.
d. Biomass may be measured as live weight.
e. Biomass in an ecosystem can be illustrated using a pyramidal-shaped graph.
A
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Which of the following is an example of a commensalism?
A) fungi residing in plant roots, such as endomycorrhizae B) bacteria fixing nitrogen in plants C) rancher ants that protect aphids in exchange for sugar-rich honeydew D) cattle egrets eating insects stirred up by grazing bison
The first cell of a new individual that is the
result of sexual reproduction is a
a. zygote. b. embryo. c. gamete. d. germ cell. e. sporophyte
HIV is most commonly transferred by
a. casual contact. b. food. c. water. d. sexual intercourse. e. insect bites.
Cells with two of each kind of chromosome are described by the term
A) polyploid. B) diploid. C) triploid. D) haploid. E) tetraploid.