What is the term given to the theory which put forth the idea that living organisms could arise by incubating nonliving components?
A) preformation
B) spontaneous generation
C) evolution
D) collective combination
E) natural selection
B
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Which of the following adaptations would NOT increase the surface area of a respiratory surface?
a. skin folds on an amphibian b. a flatworm having a broad, flat body c. branched gill filaments d. internal folds within lungs e. endothermy
Because glucose is a large molecule, it crosses the membrane through ____________________ diffusion. Fill in the blank(s) with the appropriate word(s)
Which of the following can be mutated to result in constitutive expression from the lac operon?
A) lacZ and lacP B) lacZ and lacI C) lacO and lacI D) lacO and lacZ E) lacI and lacY
"Costs" associated with sexual reproduction in plants include all of the following except:a
both male and female plants or structures are required. b. death rates are high among offspring. c. gametes must come together in order for fertilization to take place. d. flowers have adapted to attract pollinators. e. offspring have a fitness equal to that of their parents.