If bacterial DNA is cut in three locations with restriction enzymes, how many separate sections of DNA will results?
(A) 1
(B) 2
(C) 3
(D) 4
Ans: (C) 3
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When is it believed that sponges evolved?
a. 3.2 billion years ago b. 1.2 billion years ago c. 870 million years ago d. 650 million years ago e. 420 million years ago
Which of the following is FALSE?
a. The outer coats of all viruses have the same protein structure. b. The virus uses either DNA or RNA at its core but not both. c. Viruses can be replicated only after they enter a living cell. d. Most viruses have a protein coat or covering. e. A virus may remain latent for a period of time before causing infection.
Urbanization impacts
A) all species positively. B) all species negatively. C) most species negatively, but a few positively. D) most species positively, but a few negatively.
An electron microscope uses ________ lenses to focus beams of electrons onto a specimen.
Fill in the blank(s) with the appropriate word(s).