Which of the following mammals has NOT been successfully cloned?
a. sheep
b. pigs
c. humans
d. nonhuman primates
e. dogs
C
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The number of bird species on islands near Papua New Guinea __________ as one gets farther from Papua New Guinea.
A. increases B. decreases C. is unknown D. shows an inconsistent pattern E. None of the choices are correct.
Emergent properties are
a. characteristics of nonliving matter. b. exclusive to atoms but not molecules. c. neither exclusive to molecules nor compounds. d. characteristics that depend on the level of organization of matter but do not exist at lower levels of organization. e. exclusive to multicellular organisms.
The gene that codes for the repressor protein of the E. coli lac operon is constitutive; therefore, the lac operon is
typically:a. turned off. b. turned on. c. unaffected by the repressor protein. d. constitutive. e. activated by the repressor protein..
The fungi that cause serious plant disease, such as Dutch elm disease and chestnut blight, belong to the phylum
A. Zygomycota. B. Imperfect fungi. C. Ascomycota. D. Basidiomycota. E. Actinomycetes.