Answer:
Option (e).
Explanation:
Meiosis may be defined as the process of cell division in which a single parent cell divides into four daughter cells. The chromosome number reduces to half in meiosis.
Crossing over is the process of exchange of genetic material between the homologous chromosomes of the non-sister chromatids. Crossing over will bring variation in the gametes. Hence, the absence of crossing over results in the formation of gametes with less genetic variation.
Thus, the correct answer is option (e).
'm going to say <span>clear cutting </span>because clear cutting reduces a ecosystem/population of species that has been there for a while or long while. With secondary succession it is a process that is triggered by an event such as clear cutting or natural disasters.
Hopefully this helped and good luck.
Answer: none of the above
Explanation: just smart
A energy barrier must be overcome.