Which of the following has been genetically modified or enhanced for commercialized medical or agricultural purposes?
a. methicillin
b. glucagon
c. H1N1 flu vaccine
d. chickenpox vaccine
c. H1N1 flu vaccine
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When primary producers expend energy to build new tissue, this is _____
A) net primary productivity B) the amount of energy available to consumers C) maintenance costs D) net primary productivity and the amount of energy available to consumers E) maintenance costs and the amount of energy available to consumers
If meiosis did not occur in sexually reproducing organisms
1.growth of the zygote would be halted. 2.mitosis would be sufficient. 3.gametes would be haploid. 4.the chromosome number would double in each generation. 5.eggs would be haploid, but sperm would be diploid.
Why can shorter wavelengths NOT be used by pigments?
a. They would oxidize the pigment. b. They would reduce the pigment. c. They would cause the excitation of electrons. d. They would cause electrons to gain insufficient energy.
Which of the following processes is used by plants to generate gametes from gametophytes?
a. conjunction b. mitosis c. meiosis d. transduction