What proportion of the brain (approximately) is made up of neurons?
A. 100%
B. 70%
C. 50%
D. 20%
E. 2%
E. 2%
Biology & Microbiology
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A phylogenetic tree is a
A. hypothesis about the evolutionary history of a species. B. guess about the evolutionary history of a species. C. factual representation of the evolutionary history of a species D. detailed timeline of a species' evolutionary history. E. none of these
Biology & Microbiology
Cells of multicellular eukaryotes have receptors that can recognize approximately ____ pathogen-associated molecular
patterns (PAMPs).
a. 10 b. 100 c. 1,000 d. 10,000 e. 100,000
Biology & Microbiology
Make a sketch showing how nondisjunction in meiosis can result in Down syndrome. What will be an ideal response? What will be an ideal response?
Biology & Microbiology
To what class does the Eastern Gray Squirrel belong?
A. Mammalia B. Amphibia C. Aves D. Chondrichthyes
Biology & Microbiology