1. which of the following statements best supports all three species concepts?
a. biological...
Biology, 12.07.2019 19:30 GingerSnaps
1. which of the following statements best supports all three species concepts?
a. biological diversity does not vary in a smooth, incremental way.
b. in some cases, it may be difficult to predict whether incipient species will continue to diverge.
c. virtually all species exhibit some degree of genetic recombination among individuals.
d. hybrid zones may form if reproductive isolation is incomplete.
e. a single lineage may evolve over time without giving rise to a new species.
Answers: 3
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Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?
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Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
Answers: 1