Aspecies has an increased chance of extinction when:
a. it has a short generation time
b. it is involved in general biological interaction
c. it has high levels of variation
d. it has a very low effective population size
e. it has a very expansive range

Answer is D. It has a very low effective population size.

Explanation:

Extinction of an organism is the total wipe off of from the surface of the earth. This usually occur through uncontrollable human activities destroying organism natural habitat.

These activities include deforestation, hunting, burning of the forest among others.

i think its through the fallopian tube

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse