Naturalists originally divided the earth into
__________ biogeographic realms.
a. 3
b. 4
c. 5
d. 6
e. 8
Answer: d
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The bacteria that Griffith experimented with were termed R and S bacteria because
A. of the way they grew on artificial media. B. the R bacteria formed rough-appearing colonies. C. the S bacteria formed smooth-appearing colonies. D. the S bacteria had a polysaccharide capsule. E. All of the answer choices are correct.
The endosperm produced during double
fertilization is
a. diploid. b. tetraploid. c. polyploid. d. triploid. e. haploid.
Bile is produced in the gallbladder
____________________ Indicate whether the statement is true or false.
Some strains of Papillomavirus are oncogenic due to their ability to
A) lie dormant in cells for years. B) integrate into the host cell DNA. C) escape the phagosome before lysosome fusion. D) produce deoxyribonucleases. E) cause extensive damage to blood vessels.