What are two ways that the reintroduction of wolves altered the ecosystems of Yellowstone National Park?
What will be an ideal response?
Scientists were surprised to discover that after the reintroduction of the wolves to Yellowstone, the numbers of Aspen and Willow trees began to recover, the number of bison and beaver increased, and there was less erosion of the river and stream beds.
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Given a non-cyclic alkane, a non-cyclic alkene, and a non-cyclic alkyne, each of which contains six carbon atoms, which compound will contain the fewest hydrogen atoms?
A) the alkane B) the alkene C) the alkyne D) It is not possible to tell, without knowing how many double and/or triple bonds are present in the unsaturated compounds.
At high latitudes during the summer, morning and evening twilight may converge, producing a(n)____, or a nightlong twilight
a. constructive interference b. false twilight c. iridescence d. white night e. glory
Earth's oceans
A) occupy half of Earth's surface. B) each have different levels of salinity. C) are joined so there is really one global ocean. D) are continually forming new water molecules.
The downslope movement of water-saturated surface sediment is called ____________________. Fill in the blank(s) with the appropriate word(s)