Which of the following organs do NOT supply
enzymes or other compounds that aid the
digestive process in the small intestine?
a. pancreas
b. liver
c. gallbladder
d. large intestine
e. all of these organs supply enzymes or other
compounds that aid in the digestive process
in the small intestine
D
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Which of the following characteristics are
shared by all living organisms? I. organization into cells II. adaptation to environmental change III. requirement for nutrients IV. DNA housed in a nucleus
a. I and II b. I and III c. II and III d. I, II, and III e. I, II, III, and IV
What type of bonds hold the two chains of
DNA together in a DNA molecule?
a. hydrogen b. polar covalent c. nonpolar covalent d. ionic e. more than one of these
Which of the following characteristics is shared by the skin and mucous membranes?
A) They are both constantly shedding and replacing cells. B) They both have cilia. C) The outer layers are composed of dead cells. D) Sebum may be present. E) Lysozymes are always present.
Alternative exons can arise through the duplication and divergence of existing exons. What type of mutation below would be least tolerated during the evolution of a new exon?
(a) a nucleotide change of A to G (b) a deletion of three consecutive bases (c) mutation of the first nucleotide in the intron (d) a nucleotide change that alters a TT dinucleotide to AA