Answer this if u know science please

1.  DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

2.  both

Explanation:  Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary