AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

Malaria

Chapter 4: American Life in the Seventeenth Century, 1607-1692

Subject: 
Rating: 
0
No votes yet

A.???The Unhealthy Chesapeake 1.?????Life in the American wilderness was nasty, brutish, and short for the earliest Chesapeake settlers; malaria, dysentery, and typhoid took a cruel toll, cutting ten years off the life expectancy of newcomers (half of people born in early Virginia/Maryland did not survive to twenty) 2.?????The disease-ravaged settlements of the Chesapeake grew only slowly in the seventeenth century, mostly through fresh immigration from England; the majority of immigrants were single men in their late teens and early twenties, and most perished soon after arrival a.?????Surviving males competed for the affections of the extremely scarce women, whom they outnumbered nearly six to one in 1650

Estimating Bioaccumulation: DDT in a Lake

Rating: 
0
No votes yet

Estimating Bioaccumulation: DDT in a Lake (Note: this is a hypothetical example.) A medium sized lake can serve as a major food source for a subsistence community. Suppose that a community of about 100 people gets much of its protein from fishing on such a lake. Every day, each person eats one or two fish, which weigh on average about 150 grams. The fish feed primarily on shrimp, as well as insects and other small animals. You have learned that an alga that is one of the primary food sources for shrimp in the lake is contaminated with DDT, a persistent organic pesticide that farmers upstream have begun using to control ants in food crops. You want to know how much of this DDT might eventually end up in members of the community.
Subscribe to RSS - Malaria

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!