_______ are characterized by having different types of teeth to feed on different types of food.

a) fishes
b) birds
c) amphibians
d) reptiles
e) mammals


Ans: e) mammals

Biology & Microbiology

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Which of the following is a restriction placed on DNA polymerase?

A. DNA polymerase can attach new nucleotides only in the 5' to 3' direction. B. DNA polymerases must begin synthesis using an RNA primer. C. DNA polymerases must have a template strand to copy from. D. All of these are restrictions of DNA polymerase

Biology & Microbiology

Transcription begins near a site in the DNA called the ______.

A. promoter B. enhancer C. response element D. transcription unit E. regulatory sequence

Biology & Microbiology

Which bacterial groups typically colonize the newborn within the first 12 hours of birth?

What will be an ideal response?

Biology & Microbiology

Injecting DNA into cells can be accomplished using

A. nitrocellulose membranes. B. silicon chips and nucleic acids. C. compressed air and gold beads. D. micropipettes. E. micropipettes, or compressed air and gold beads.

Biology & Microbiology