The coal deposits of Siberia were probably derived from plants that grew in arctic climates
a. True
b. False
False
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All of the following are common sources of ground water pollution except
A) leaky underground storage tanks. B) oil tanker spills. C) leaky septic systems. D) landfill leaching.
In a rural hilly neighborhood, a landowner uses bulldozers to clear all but the largest trees and cleans up a nearby stream, lining the bottom of the stream with decorative rocks and stepping-stones
Planting lawn grasses around the base of the trees, the owner wants to create a park-like setting around his home. We expect that in this ecological simplification of the cleared yard, there will be A) more species of invertebrates in the stream and on the land but fewer species of vertebrates and plants everywhere. B) more mammal and plant species but fewer birds and invertebrates on the land and in the stream. C) fewer species of vertebrates and plants everywhere but more invertebrates in the stream. D) fewer species of plants, invertebrates, and vertebrates everywhere.
?A survivorship curve shows the percentages of the members of a population surviving at different ages.
Answer the following statement true (T) or false (F)
Which one of the following statements is not true of tornadoes?
A) occur most frequently in the spring of the year B) most common in the Midwest and Great Plains C) usually occur along the warm front of a mid-latitude cyclone D) associated with cumulonimbus clouds