I think the correct answer from the choices listed above is the third option. The barrel of a gun is also known as bore. The barrel is the metal tube which the bullet is fired and the bore is the inside of the barrel. It is the one closest to the barrel so it must be the answer.
Genus
for example
scientific name for tiger : Panthera Tigris
Panthera is the Genus name
Tigris is the Species name
hope this helps
D would occur more rapidly.
I believe A:Both have reproductive cells with flagella
