When humans are developing in utero they have characteristics that are not found in the fully developed infant. Which type of homology does this typify?
A. Developmental.
B. Structural.
C. Vestigal.
D. Molecular.
E. Both developmental and vestigal.
A. Developmental.
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The characterization of prions demonstrated that:
A. this viruslike structure can cause disease. B. secondary structure of a prion can cause disease. C PrPC causes disease. D. this viruslike structure and secondary structure of a prion can both cause disease. E. secondary structure of a prion and PrPC both cause disease.
Anthropoids arose at least:a
45 million years ago. b. 22 million years ago. c. 10.2 million years ago. d. 5 million years ago. e. 2.6 million years ago.
In vertebrates, DNA methylation - the addition of a methyl group to DNA nucleotides - ensures that
A. the gene functions without interruption. B. once that gene is transcribed, the mRNA is saved and used over and over again. C. no errors will be made during transcription. D. once a gene is turned off, it will remain off. E. the nucleosome will quickly form, which assists in mRNA formation.
A fasting animal whose energy needs exceed those provided in its diet draws on its stored resources in which order?
A) fat, then glycogen, then protein B) glycogen, then protein, then fat C) liver glycogen, then muscle glycogen, then fat D) muscle glycogen, then fat, then liver glycogen