As a visitor to a country in which cholera is an endemic disease, what specific steps would you take to reduce your risk of cholera exposure? Will these precautions also prevent you from contracting other waterborne diseases? If so, which ones?
Identify waterborne diseases for which your precautions may not prevent infection.
What will be an ideal response?
Answer: To avoid contracting cholera, travelers should wash their hands and/or use a ethanol-based hand sanitizer regularly, as well as drink only bottled water or other bottled beverages. Ice, raw food (even raw vegetables or fruit), and raw or undercooked fish and shellfish should be avoid as well. These precautions will help prevent other waterborne diseases such as typhoid fever and norovirus, but will NOT prevent legionellosis.
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A) allelic B) monohybrid C) test D) dihybrid
Which of the following is most important for retaining water in soil for use by plants?
a. sand b. humus c. clay d. silt e. rock
Which of the following is MOST accurate regarding cells?
a. All cells have a nucleus. b. All cells divide by meiosis. c. All living organisms are made up of one or more cells. d. Cells arise through spontaneous generation. e. Growth is solely the result of cell division.
The symplast:a
greatly increases the surface area of the root. b. is a waterproof band surrounding the endodermis. c. directs the movement of water from one cell's cytoplasm to the next through plasmodesmata. d. secretes suberin, which waterproofs the cells. e. allows nutrient minerals to move against their concentration gradient.