Why are there only 23 chromosomes in human sperm and human egg cells?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation

What type of graph presents information about how often certain or traits occur?