Most of the flesh of an apple is an enlarged ____
a. receptacle
b. carpel
c. drupe
d. pepo
e. hesperidium
ANSWER: a
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Rheumatic fever is an autoimmune complication caused by a ________ infection.
a) Staphylococcus aureus b) Francisella tularensis c) Brucella melitensis d) Streptococcus pyogenes
steroid
What will be an ideal response?
Which of the following methods would be the most suitable to assess the relative purity of a protein in a sample you have prepared?
(a) gel-filtration chromatography (b) gel electrophoresis (c) western blot analysis (d) ion-exchange chromatography
The early atmosphere of Earth consisted mainly of
A. oxygen, water vapor, and carbon monoxide. B. water vapor, hydrogen, and carbon dioxide. C. hydrogen, carbon monoxide, and nitrogen. D. hydrogen, oxygen, and carbon dioxide. E. water vapor, nitrogen, and carbon dioxide.