help with the following questions that are similar please! Q1: When a rare mutation by chance allows a protein to infect

[answerhappygod]

help with the following questions that are similar please!
Q1:
When a rare mutation by chance allows a protein to
infect a new species, this is called a spill-over infection. Which
of the following statements is not true about
spill-overs
a) Most are successful. Once a virus can infect a new species it
does so very well.
b) The mutated virus is usually not very good at infecting the
new host.
c) The mutation may alter how the virus infects its primary
host.
d) Most spill-overs are dead-ends.
Q2)
Which biological process helps the virus get better at
infecting a new host?
a) Natural selection
b) Homeostasis
c) Metabolism
d) Cell differentiation
Thank you!