As a mechanism of evolution, natural selection acts on variants within populations and ultimately leads to the evolution of different species was proposed by
A. Mendel.
B. Malthus.
C. Founder.
D. Lyell.
E. Darwin.
E. Darwin.
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An enzyme has a total of four active sites. When you denature the molecule and study its composition, you find that each active site occurs on a different polypeptide. Which of the following hypotheses does this observation support?
A) The enzyme is subject to regulation. B) The enzyme requires a cofactor to function normally. C) The protein's structure is affected by temperature and pH. D) The protein has quaternary structure.
Discuss how only one blocked metabolic pathway, such as the one leading from phenylalanine, has the potential to cause many different disorders
What will be an ideal response?
Which classification represents all of the species that are similar to one another and distinct from others with respect to
certain traits? a. class b. order c. family d. genus e. species
The earliest known land plants date to the
A) Pleistocene (late Cenozoic era). B) Ordovician (early Paleozoic era). C) Carboniferous (late Paleozoic era). D) Jurassic (middle Mesozoic era).