How is density of an object calculated

Afarmer has applied a pesticide to control a pest population that is affecting her crops. the pest population has reacted as shown below. which best describes the process that the pest population has experienced due to this environmental change? a genetic diversity b natural selection c natural resistance d genetic resistance

What are two reasons for why a species might disappear from the fossil record?

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions