The bacterium Bacillus tumefaciens has been harnessed in biotechnology because it can insert a gene from one species of plant into another. This can also occur in nature and is referred to as
A. vestigial transfer.
B. homology.
C. horizontal gene transfer.
D. vertical evolution.
E. exon shuffling through endocytosis.
C. horizontal gene transfer.
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Discuss the theory of secondary endosymbiosis and defend the theory by providing evidence that supports it
What will be an ideal response?
Prolactin, oxytocin, and estrogen exhibit which type of hormone interaction?
a. synergistic b. permissive c. opposing d. unrelating e. mutual
All of the following support the idea that RNA may have been the first genetic material EXCEPT?
A. There are viruses that use RNA as genetic material. B. RNA is a simpler molecule than DNA. C. RNA does not mutate. D. RNA has been shown to be able to make copies of itself.
The cellular branch of adaptive immunity
A) is organized by T cytotoxic cells and carried out by T helper cells. B) does not involve a memory function. C) is based on antibody production. D) is organized by T helper cells and carried out by T cytotoxic cells. E) is based on the activity of both T and B cells.