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