Biology, 02.07.2019 15:00 pablogonzaleztellez
Many farmers use pesticides, which are chemicals that kill insects and increase the productivity of crops. one such pesticide, ddt is now illegal because it was too effective. it not only killed insects, but also killed predatory animals of insects, like birds, and entered the food chain and affected humans. why do you think that the fda banned the use of ddt?
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Biology, 21.06.2019 17:00
Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models
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Which of these is evidence of global warming? a. overall rising seal levels b. falling global temperatures c. an increase in the size of glaciers d. stable precipitation patterns appex
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