In 2003, the majority of AIDS deaths occurred in
A) South America.
B) North America.
C) Europe.
D) Sub-Saharan Africa.
Answer: D
Biology & Microbiology
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Pseudostratified epithelial tissue is found lining the
a. throat. b. digestive tract.. c. inside of the skull. d. peritoneal cavity. e. adipose layer.
Biology & Microbiology
Which of the following structures decreases diffusion distances for oxygen and carbon dioxide by delivering air directly to body cells?
A) Spiracles B) Gill filaments C) Parabronchi D) Bronchi E) Tracheoles
Biology & Microbiology
Plants cannot fix nitrogen, but legumes are often called nitrogen fixers. Explain why this label is appropriate
What will be an ideal response?
Biology & Microbiology
Which species is considered to be the most ancient?
A. Homo erectus B. Australopithecus afarensis C. Australopithecus sediba D. Homo sapiens E. Sahelanthropus tchadensis
Biology & Microbiology