When a scientist takes a small part of a habitat and counts the population, then applies it to the entire habitat, he/she is practicing
indirect observation
direct observation
mark and recapture
sampling

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 is the main fuel source for the work of the cell

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above