The function of nectar is:
A. provision of carbohydrates for the plant
B. attraction of pollinators
C. preservation of delicate flower parts
D. a sticky trap for parasitic insects
E. none of the other choices provided
B. attraction of pollinators
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leu refers to a gene that governs a cell’s ability to synthesize leucine from inorganic precursors. The
designation leu- indicates:
a. that the allele is normal. b. that the allele is the mutant allele. c. that the bacterium is biologically active. d. that the bacterium is biologically inactive. e. that the bacterium can make its own leucine.
What is the definition of the standing crop biomass?
a. amount of sunlight absorbed by the plants b. assessing the health of the plants c. dry weight of the plants d. number of plant species present e. productivity of the plants
ISO membranes are inside-out membrane vesicles used by researchers in membrane studies. As a molecule diffuses into the vesicle, it will encounter the layers of the membrane in the following order
A) tail-head-head-tail. B) head-tail-head-tail. C) tail-head-tail-head. D) head-tail-tail-head. E) head-head-tail-tail.
In which period of evolution, in the Cenozoic era, would you find Homo sapiens?
A. Cretaceous B. Neoprene C. Jurassic D. Quarternary E. Paleogene