Answer:
D. it takes millions of years to form
Answer:
Horses have 64 chromosomes and donkeys 62, so when the two breed their mule offspring ends up with 63. Because this is an odd number, it's impossible for them to divide evenly into two. That means the mule cannot produce sperm and egg cells that carry exactly half the animal's chromosomes, as should happen.Aug 28, 2018
Cell membrane is the largest. Most important. Of course all cells are different and shape size also. they all have difference.
