___________ are the fundamental structural units of all living things.
A. Molecules
B. Atoms
C. Cells
D. Protons
C. Cells
Biology & Microbiology
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Steroid hormones are derived from:
A. cholesterol. B. amino acids. C. proteins. D. nucleotide bases. E. phospholipids.
Biology & Microbiology
A new species, ________, was recently shown to have two membranes, like a Gram-negative bacterium, but be phylogenetically related to the Gram-positive family Veillonellaceae.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
In the United States, about __________ teenagers
join the ranks of habitual smokers each day. a. 1,000 b. 2,000 c. 3,000 d. 4,000 e. 5,000
Biology & Microbiology
Which of the flowering plant structures is used to attract a specific type of pollinator?
A. carpel B. stamens C. petals D. sepals
Biology & Microbiology