Which of the following are the greatest health threats in a developing country?
A) Cardiovascular disease, including heart attacks and strokes
B) Poisoning and exposure to carcinogens
C) Conditions arising from poor nutrition and lack of hygiene
D) Injuries from manual labor and agriculture
C
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Most tornadoes move from:a
northwest to southwest. b. southwest to northeast. c. south to north. d. southeast to northwest
One of the longest field studies of predator-prey population cycles has been of ________
A) grizzly bear and humans B) bison and prairie grass C) lynx and snowshoe hares D) moose and fox E) flying squirrels and grizzly bear
The larger wingspan could be called
a. an adaptive trait b. genetic variability c. a heritable trait d. an adaptive trait and a genetic variability e. a heritable trait, an adaptive trait and a genetic variability
Which of the following has been used historically to reduce agricultural pests?
A. Salt B. Sulfur ointments C. Planting insect repelling plant and flowers. D. Lime E. All of these methods have been used as pest control