It is well-documented that while some synthetc pesticides have caused great harm to living creatures, others have saved lives. Give a brief account of one that has, ironically, saved human lives: DDT
What will be an ideal response?
Since 1945, it is estimated that DDT and other insecticides have probably prevented the premature death of at least 7 million people and possibly up to 500 million people from insect-transmitted diseases such as malaria (carried by the Anopheles mosquito), bubonic plague (carried by rat fleas) and typhus (carried by body lice and fleas).
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What causes the stress that forms joints?
A) Burial and tectonic forces B) Cooling and contraction C) Uplift and unloading of pressure D) All of these are correct. E) None of these are correct.
_____________________ ___________________ is an important tool in geology because it allows geologists to
subdivide sedimentary rocks into related units that are bounded by time-stratigraphically significant boundaries. Fill in the blank(s) with the appropriate word(s).
Which of the following best matches the description?Lowland area on either side of a river.
A. tract development B. floodplain C. multiple land use D. floodplain zoning E. ribbon sprawl F. megalopolis G. wetlands H. urban sprawl I. zoning J. land-use planning
The west coast of South America and the east coast of North America have very different continental margins
Indicate whether the statement is true or false