Domains of a protein can best be described as:
A. the unique sequences of each participating protomer.
B. functional components of a protein.
C. independently folding units of a polypeptide chain.
D. None of the answers provided is correct.
E. All of the answers provided are correct.
E
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A variety of finch species within the Hawaiian Islands have acquired different types of beaks needed for utilizing specific food resources. The process by which these different species of finches came about is likely to have involved
A. natural selection. B. evolution. C. an accumulation of harmful genetic mutations. D. both natural selection and evolution. E. None of these choices are correct.
Tris-BP was banned after the discovery that the chemical caused cancer in test animals and was
____________________ through the ____________________ by those wearing treated clothing. Fill in the blank(s) with the appropriate word(s).
Which of the following statements about root cap is FALSE?
a. It protects the delicate root apical meristem b. It secretes lubricating polysaccharides c. It orients the root that it grows downward d. It loses cells during root growth. e. It absorbs nutrients.
Which of the following would be an indication that evolutionary change is occurring within a species?
A. The number of organisms in the species is increasing. B. New learned behavior patterns are appearing. C. No mutations have occurred within individuals of the species. D. Some alleles have been lost from the species.