Which gymnosperms made their appearance in the Triassic and became very widespread?
a. angiosperms
b. cycads
c. horsetail rushes
d. seed ferns
e. cryptosperms
b
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During the 1960s Sudbury, Ontario's prosperity was tempered by environmental problems. What was the problem?
A) Methyl isocynate released as a byproduct resulted in a massive fish and animal kills, and endangered human health. B) Cyanide and heavy metals entering the biosphere made local crops toxic to humans. C) Sulfur dioxide emissions killed much of the local vegetation creating a huge barren area. D) Petroleum waste, and floating trash caused portions of Nephawin Lake to catch fire.
Although tropical rain forests are only about 2% of the earth's land surface, they contain about 50% of the world's land plant and animal species.
Answer the following statement true (T) or false (F)
What are the main components of our weather, and how is weather related to climate?
What will be an ideal response?
The disastrous affects of a large scale water transfer project was demonstrated in which water body?
A. Mediterranean sea B. Black sea C. Aral sea D. Red sea E. Bering sea