More than 50% of the original wetlands found in the United States have been drained and filled.
Answer the following statement true (T) or false (F)
True
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Peak-oil scientists estimate we have depleted ________ of the world's oil reserves
A) 1/4 B) 1/3 C) 1/2 D) 1/8 E) 1/16
Populations of zooplankton can ________.
A. accumulate at water-layer density boundaries B. move toward the sea surface at night C. accumulate at water-layer density boundaries and reflect sound waves D. accumulate at water-layer density boundaries, move toward the sea surface at night, and reflect sound waves E. reflect sound waves
____________________ keep the price of water so low that users do not worry about wasting water
Fill in the blanks with correct word
Fish with limbs containing a fleshy shaft and a series of articulating bones; one of two main
groups of bony fish:a. chordates d. Ichthyostega b. ostracoderms e. labyrinthodonts c. lobe-finned fish