DDT Study guides, Class notes & Summaries

Biomagnification correct answer: Biological concentration; The tendency for some substances to concentrate with each trophic level. - toxic substances become increasingly concentrated within living organisms as they move up each step of the food chain. Point Source correct answer: Sources of pollution such as smokestacks, pipes, or accidental spills that are readily identified and stationary Non-Point source correct answer: These are diffuse sources of pollution such as urban runoff ...

how long have homo-sapiens been on earth Correct Answer: thought to be 200,000 years, starting in ethiopia mutation Correct Answer: change in nucleotide in the base of DNA; not all harmful; passed down in generations of that descent when did humans establish themselves worldwide Correct Answer: 12,000 years ago; before humans and agriculture coincided how did humans live before agriculture Correct Answer: used tools (needles, spears, clothes) and lived in small groups spread out of la...

Until malaria and AIDS, what was the most devastating plague? Correct Answer: The Black Death How did 17th century doctors treat the plague? Correct Answer: They inspected patients with pointers and would use spice-filled pomanders to fend it off. What feeds off on blood of mammals such as rats and birds, in which they spread the bacteria that causes plagues? Correct Answer: Fleas How do people normally get the plague? Correct Answer: From being bitten by a rodent flea that is carryin...

CIH Flashcards Questions and Answers 100% Verified 2023 Organochlorides Chlorinated hydrocarbons DDT, Chlorodane, Aldrin, Kepone Stored in body fat, non-polar, lipid soluble Hepatotoxic, nephrotoxic, neurotoxic Aliphatic Hydrocarbons Opposite of aromatics (no benzene, open chain) Gases C1-C4, Liquids C5-C16, Solids >C16 Halogenated Hydrocarbons Carbon Tetrachloride - potent hepatotoxin, Methylene Chloride - metabolizes into CO Cotton Dust Causes Byssiosis or brow...

Contemporary Issues in Biology Final ~ TCU, Sawey Exam Questions and Answers how long have homo-sapiens been on earth - Answer- thought to be 200,000 years, starting in ethiopia mutation - Answer- change in nucleotide in the base of DNA; not all harmful; passed down in generations of that descent when did humans establish themselves worldwide - Answer- 12,000 years ago; before humans and agriculture coincided how did humans live before agriculture - Answer- used tools (needles, spears, c...

Pest - ANSWER an undesirable organism that injures humans, desirable plants and animals, manufactured products, or natural substances. pathogens - ANSWER disease-causing organisms, such as viruses, bacteria, or fungi Pesticide resistance - ANSWER When pests adapt and become resistant to a pesticide. First seen in resistance to DDT in 1947 bioaccumulation - ANSWER The accumulation of pesticide in the fatty tissue of some animals biomagnification - ANSWER The Food chain. Organ...

Mosquito Control in Florida in 20th century tourism rocketed after control of salt marsh mosquitoes, prior to this S. penninsular part of FL = unhabituale, orange county = mosquito county first organized mosquito effort in FL" WW1 joint effort between US army and US public health service @ camp johnson near jacksonville, 1919 city of Perry in the 30s and 40s 1500 miles of drainage ditches dug to drain mosquito breeding habitats, Burea of malaria Control created wtihin Division of Health, ...

By the year 2025, the world population is projected to be? - 8 billion The acronym USDA stands for the government agency known as? - United States Department of Agriculture What is the meaning of the Greek word bios? - life The Greek word logy means? - study Organic food is a term used for foods that have been grown? - without use of chemical pesticides Which terms refers to all the conditions, circumstances, and influences surrounding and affecting an organism or group of organisms? - en...

Question 1 Correct 1.00 points out of 1.00 Flag question Question text The Industrial Revolution has led to an increased reliance on fossil fuels to a. power farm machinery. b. produce irrigation pumps. c. power farm machinery and to produce fertilizers and pesticides. d. develop new types of crops. Feedback Your answer is correct. The correct answer is: power farm machinery and to produce fertilizers and pesticides. Question 2 Incorrect 0.00 points out of 1.00 Remove flag ...

T/F- Agriscience refers to the application of high technology to agriculture - True Which of the following terms means "life" or "living"? - Bio T/F- Wildlife, trees, and fish are examples of renewable natural resources. - True T/F Intensive farming practices will likely play a big role in preserving our forests. - True T/F Potatoes that have been genetically modified to resist the Colorado potato beetle unfortunately produce a chemical that also produce a chemical that also affects hum...