Autotrophs that dwell in dark caves, wells, or on the ocean floor often depend on which of the following biogeochemical processes?
A) Chemosynthesis B) Photosynthesis C) Nitrogen fixing D) Nutrient leaching
A
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Which of the following molecules contains a ketone?
A. a B. b C. c D. a or b E. all of the above
Answer the following statement(s) true (T) or false (F)
1. The colonists labeled local ethnic groups as "lazy". 2. Many thousands of years ago, the Sahara was more humid than today. 3. The Masai are one of Rwanda's main rival tribes and are shorter with flat noses. 4. Manufacturing brings in most foreign exchange to the countries of Central Africa. 5. The Orange River in Southern Africa flows east and empties into the Indian Ocean.
On average, how frequent are earthquakes?
A) hundreds per day B) hundreds per year C) thousands per day D) thousands per year
Biomagnification
What will be an ideal response?