Provide an example to describe how a food chain works to concentrate a substance from one species to the next
How a Food Chain Works
A person who eats fish regularly may consume about 100 pounds of it in a year. These fish will, in turn, have eaten a few tons of small plant-eating fish during their lifetime. The little plant eaters will have ingested several tons of plants. If the plants have been contaminated with toxic chemicals, the bodies of the small fish that eat them will contain high concentrations of the chemicals; the larger fish that eat the little fish will harbor even higher amounts of the chemicals; and so on through the food chain. If none of the chemicals are lost along the way, the person at the top of the food chain ultimately eats the same amount of chemical contaminants that was contained in the original several tons of plants at the bottom of the food chain.
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Answer the following statement true (T) or false (F)
A low income 14 year old girl is 4 months pregnant. She is 5'5" and weighs 140 lbs. Which of these factors is most likely to make her a high risk pregnancy?
a. weight b. age c. income d. none of these
Which of the following types of cancer is related to environmental factors, not genetic factors?
a. Colon b. Pancreas c. Prostate d. Endometrial
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a. true b. false