Which of the following describes the products formed by the dehydration of trans-4-methylcyclohexanol?
A) The only product is 4-methylcyclohexene.
B) The only product is 5-methylcyclohexene.
C) The major product is 4-methylcyclohexene and the minor product is 5-methylcyclohexene.
D) The major product is 5-methylcyclohexene and the minor product is 4-methylcyclohexene.
A
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Which organization controls over 75% of the world's oil?
A. OPEC B. NATO C. Eurozone D. Pan-Asian
Which of the following is not true of dry climates?
A) Dry climates are generally located in bands immediately to the north and south of the low-latitude humid climates. B) Many dry regions are associated with the subtropical high pressure zone. C) Some deserts are caused mainly by mountain ranges that isolate land from ocean sources of moisture. D) Arid climates have severe moisture shortages year round, while most semiarid climates have a rainy season in which sufficient moisture is available for abundant, if brief, vegetation growth. E) Both arid and semiarid regions lack sufficient moisture and heat to make any plants grow for more than a month each year.
The greenhouse effect refers to the warming of Earth's climate caused by increased plant respiration.
Answer the following statement true (T) or false (F)
Lung-fish are important in the fossil record because amphibians evolved from them. Indicate whether the statement is true or false