How did one ancestral population give rise to many different species

Which of the following best describes the purpose of technology?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials