Our closest extinct relative is
a. Homo erectus
b. Homo habilis
c. Homo neanderthalensis
d. Australopithecus afarensis
e. Australopithecus africanus
C
Biology & Microbiology
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The most common circulating antibody, comprising about 80% of the serum immunoglobin, is
A) IgA. B) IgC. C) IgD. D) IgG.
Biology & Microbiology
Which stage of the cell cycle covers most of the life span of a cell?
a. interphase b. mitosis c. meiosis d. cytokinesis
Biology & Microbiology
On rocky shores, shallow pools produced by ebbing tides maintain the same temperature and salinity as the open ocean
Indicate whether the statement is true or false
Biology & Microbiology
Breathing rate increases during exercise because
A. the heart is beating more rapidly. B. there is less oxygen in the blood. C. there is more carbon dioxide in the blood. D. there is an increase in blood pH.
Biology & Microbiology