Which nutrient enhances iron absorption from the intestinal tract?

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

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.