All genes in DNA code for proteins.
a. true
b. false
Ans: b. false
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Organisms that have been modified to contain DNA from other species are known as (select all that apply)
A. transgenic organisms. B. genetically modified organisms (GMO's). C. recombinant DNA organisms. D. Sanger recombinants. E. DNA hybrids.
What cell type is responsible for the formation of the blood-brain barrier?
A. oligodendrocytes B. interneurons C. Schwann cells D. astrocytes
Fungi spores are haploid; what distinguishes haploid spores?
A. Haploid spores have a double set of chromosomes, half the number of chromosomes of diploid organisms. B. Like diploid organisms, haploid spores have a single set of chromosomes. C. Haploid spores have a single set of chromosomes, half the number of chromosomes of diploid organisms. D. Like diploid organisms, haploid spores have a double set of chromosomes.
All of the following statements about master
genes are true EXCEPT:a. They orchestrate layers of development. b. They are highly conserved over evolutionary time. c. Mutations within these are frequently devastating. d. They are highly variable in their sequences between species. e. Mutations usually result in changes in body plan