A plant's tendency to grow toward a source of light is called
A) phototropism.
B) lumitropism.
C) gravitropism.
D) amylotropism.
E) thigmotropism.
A
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Assume that production of hairs on a plant’s leaves is controlled by a single gene with two alleles, H (dominant) and h (recessive). Hairy leaves are dominant to smooth (nonhairy) leaves.
a. Name the genotype(s) of a smooth-leaved plant. b. Name the genotype(s) of a hairy-leaved plant. c. What are the possible genotypes of gametes produced by the smooth-leaved plant? d. What are the possible genotypes of gametes produced by the hairy-leaved plant? Homozygous:
Nitrogen is used in plant cells to produce which of the following?
A. sugars B. proteins and nucleic acids C. proteins D. sugars and nucleic acids E. nucleic acids
List the five conditions that must be met in order to satisfy the predictions of the Hardy-Weinberg principle. What will be an ideal response?
In what year did Stanley Prusiner discover prions?
a. 1928 b. 1979 c. 1997 d. 1982