How can reproductive isolation in plants be mediated through pollinators?
What will be an ideal response?
ANS:
If plants of two different species are pollinated by different pollinators, then the pollen from one plant will never reach the ovules of the other.
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Each of the following statements is true for Toxoplasma gondii except that
A. it can cause stillbirth. B. infection often fatal for AIDS patients. C. it is a flagellated parasite. D. it has a narrow host range.
The weakest symbiotic association, in which one
species simply lives better in the presence of another species is a. commensalism. b. competitive exclusion. c. mutualism. d. facultative obligate mutualism. e. parasitism.
Which enzyme is responsible for integration of a temperate phage into a host genome?
A) ?-galactosidase B) transposase C) integrase D) transacetylase E) permease
How do hormonal methods prevent conception?
What will be an ideal response?