Explain the process of biological magnification.
What will be an ideal response?
Because persistent chemicals like PCBs break down very slowly in the environment, and are fat-soluble, they can be biologically magnified in food chains and food webs. Each consumer in the food chain accumulates the chemical present in its food, and passes it all on to the organisms that eat it, and so on up the chain.
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Which is NOT a cause of deforestation in South Asia?
A) commercial logging B) urban expansion C) industrialization D) aquaculture expansion E) clearing land for agriculture
The amount of water vapor in the air at a time and place is called ____.?
a. capacity
b. the saturation deficit
c. humidity
d. the precipitation potential
e. transpiration
Machinery and transportation equipment accounted for the largest single proportion of exports in 2007 (43%)
Indicate whether the statement is true or false
Glaciers represent ____% of the total freshwater on the surface of the Earth
a. 97.1 b. 2.24 c. 0.306 d. 0.009