Which system is considered an open system?
a. a human
b. a thermos
c. a wine keg
d. a greenhouse
e. the Earth
ANSWER: a
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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
During a scientific expedition to an unexplored forest, you discover a new species of plant. The plant has net-veined leaves, flowers, and pollen grains with a single groove. Based on this information, you assign the plant to which of the following groups?
1.eudicots 2.gymnosperms 3.magnoliids 4.monocots
Biologists consider the green algae to be the ancestors of plants because
What will be an ideal response?A. green algae have the same kind of chlorophyll as plants. B. many green algae form colonies with specialized cells. C. green algae and plants both have cellulose cell walls. D. All of the above are true.
What three outcomes result from a human T lymphotropic virus infection?
What will be an ideal response?