What is altruism?
A. Acts that cost the actor but do not benefit another
B. Acts that cost the actor and benefit another
C. Acts that do not cost the actor and do not benefit another
D. Acts that do not cost the actor and benefit another
Answer: B. Acts that cost the actor and benefit another
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The restriction enzymes BamHI and BclI cut at the points indicated by arrows: If one sample of DNA was cut with BamHI and another with BclI, and these two samples were mixed and treated with DNA ligase, what would occur?
A) No DNAs would be ligated (joined together). B) Only the BamHI-cut DNA would be ligated. C) Only the BclI-cut DNA would be ligated. D) Both BamHI-cut and BclI-cut DNAs would be ligated, but only to DNA fragments cut with the same enzyme (for example, BamHI fragments would be ligated only to other BamHI fragments). E) Both BamHI-cut and BclI-cut DNAs would be ligated with no preference for which fragment is ligated to which other.
What type of thinking is required?
What will be an ideal response?
In order to successfully and safely deliver a gene to a human cell, a virus vector must be
A) both infectious and pathogenic. B) packaged with RNA rather than DNA. C) pathogenic but not infectious. D) infectious but not pathogenic. E) a retrovirus.
Under the island model of migration, allele frequencies will not be in Hardy–Weinberg equilibrium in the is-land population unless:
What will be an ideal response?