Supertasters for the chemical PTC are ____ for the trait
a. homozygous dominant
b. heterozygous
c. homozygous recessive
d. either homozygous dominant or homozygous recessive
e. either homozygous dominant or heterozygous
a
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The change in free energy of a reaction varies
Indicate whether this statement is true or false.
What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?
A. From the inward folding of the plasma membrane B. From engulfing eukaryotic cells C. From engulfing prokaryotic cells D. From the spontaneous formation of phospholipids
Carotenoids are important to many plants because these pigments are able to:
A. remove carbon dioxide from the air B. absorb violet and blue-green wavelengths of light that are not absorbed by chlorophyll C. absorb water so that hydrolysis can be carried out in the chloroplasts D. store electrons for use during the "dark" reaction of photosynthesis E. capture UV radiation that is harmful to the DNA in the nucleus of plant cells
A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of
A) complete dominance. B) multiple alleles. C) incomplete dominance. D) polygenic inheritance. E) pleiotropy.