Based on this diagram, which organisms evolved more recently?
a. humans and pigs
b. moths
c. tuna
d. yeast
A
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The sudden increase in the occurrence of a disease above the expected level is called ________.
A. an endemic B. hyperendemic C. sporadic D. an epidemic
Air is continuously forced through tubes that
thread through vascularized tissue in a pair of inelastic lungs in a. some fish. b. amphibians. c. birds. d. reptiles. e. some small mammals
A mutagen has introduced a frame-shift mutation by adding one nucleotide base. Which of the following could be a reversion mutation for this particular mutant?
A) deleting 2 bases only B) adding 1 base only C) deleting 1 base or adding 1 base D) deleting 1 base or adding 3 bases E) deleting 1 base or adding 2 bases
p53 is a tumor suppressor gene that acts as a sensor of DNA damage.
Answer the following statement true (T) or false (F)