In 1939, the use of ddt (a powerful synthetic chemical) as an insecticide was discovered. the united states adopted its widespread use, producing up to 100 million kilograms per year (200 million pounds per year). twenty years later, severe side effects started to be reported as a result of ddt use. which was an advantage of using ddt?

insect and pest populations decreased

birth defect rates increased

cancer rates increased

fertility rates decreased

15 points come and ! which characteristic describes all bacteria? a rod-shaped b microscopic c multicellular d autotrophic

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Ateam from new york presbyterian hospital is conducting a study about a recent increase in cases involving both excess sweating and kidney stones. what would the team need before it draws a conclusion about the cases? medications that are specifically designed to treat the sickness machines that are built to process blood and reduce symptoms until patients are healthy again data that profile the various patients who report these symptoms proof that the excess sweating is related to the excessive kidney stones