Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46<span> chromosomes. The type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction.</span>
Because its decayed organisms. So all the nutrients from that decayed organism goes into the soil and makes it rich with nutrients.
The parachute was invented 4,000 yrs ago! :)
