Although artificial selection may seem slow and unreliable, ____________________ observed that after only a few
generations, breeders produced many varieties of pigeons and minks Fill in the blank(s) with the appropriate word(s).
Charles Darwin
Darwin
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Infants acquire natural passive immunity from maternal antibodies transferred across the placenta or in breast milk
Indicate whether the statement is true or false.
Match the following items with the correct phrases.
_______1. Semisynthetic penicillins that are known as penicillinase-resistant penicillins. _______2. Examples of antibiotics that inhibit cell wall synthesis. _______3. Semisynthetic penicillins that are not resistant to penicillinase. _______4. Examples of antibiotics that inhibit protein synthesis. _______5. Examples of antibiotics produced by molds. a. penicillin, bacitracin, cephalosporins, vancomycin b. ampicillin and carbenicillin c. methicillin, oxacillin, cloxacillin, nafcillin d. tetracycline, chloramphenicol, erythromycin, streptomycin e. penicillin and cephalosporins, but not bacitracin and vancomycin
For acid rainwater, which has a pH as low as 3.0, which of the following is true?
a. [H+] < [OH?] b. [H+] = [OH?] c. [H+] = 0 d. [OH?] = 0 e. [H+] > [OH?]
Glycolysis depends on a continuous supply of ____
a. NADH b. pyruvate c. water d. glucose e. oxygen