A farmer has planted a field of clover as a cover crop to protect his field from erosion during the winter months. In the spring, he plows the clover into the topsoil. What kind of fertilizer does this technique create?
A. green manure
B. animal manure
C. compost
D. synthetic
Answer: A
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The small number of livestock and grains that humans depend on for food places us in an advantageous position to withstand the effects of environmental degradation.
Answer the following statement true (T) or false (F)
________ is the major dissolved volatile constituent in both magmas and volcanic gases
A) Carbon monoxide B) Water C) Methane D) Hydrogen chloride
The thinning of the ozone layer over the Antarctic always occurs at the end of the Antarctic winter because
A. ozone is consumed by melting ice as winter transitions to summer. B. the Antarctic experiences its highest level of radiation during its winter. C. during their winter, residents of the southern hemisphere use more CFCs. D. UV from the sun is necessary to the creation of ozone from oxygen and the Antarctic receives no UV from the sun during its winter.
Which of the following is an example of a specialization that plants in the desert may have?
A. Salt tolerance B. Storing water in stems or roots C. Reducing water loss with thick epidermal layers D. All of these are adaptations of plants living in desert conditions