Do you feel that viruses show speciation, and do you consider viruses like the smallpox virus to be ...

Answer to q. 1

It really boils down to whether you consider viruses as living or non-living. Many scientists categorize
them as an intermediate category between the living and non-living. If you consider viruses as alive,
they mutate frequently so you could consider that as speciation. Also if you consider viruses as living
things, I suppose the smallpox virus is endangered since it is not present in the environment
currently.

Answer to q. 2

ANS:Prezygotic
isolating mechanisms generally arise incidentally owing to species adapting to different
environments or environmental factors. The do not evolved specifically to isolate the species, and if
forced, two species otherwise separated may produce perfectly fertile offspring. Temporal isolation,
for example, might be overcome by cold-storage of sperm or pollen for artificial insemination or
pollination later in the season. Mechanical isolation due to differences in genital structure might be
also be bypassed by artificial insemination. In orchids, species are isolated primarily by being adapted
for pollination by specific species of insect, but humans can freely cross-pollinate species within, and
in some cases, between genera, resulting in a vast array of hybrids.

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