What makes up an ecosystem?
A) energy and matter and the organisms competing for resources in the ecosystem
B) living and nonliving parts and energy movement created by the sun
C) energy and matter and the organisms functioning apart
D) living and nonliving parts and the processes that disconnect them
E) living and nonliving parts and the processes that connect them
E
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Net energy yields are important in evaluating energy resources. What other factors that should be considered in determining how much useful energy a resource actually provides?
What will be an ideal response?
High-pitched sound has a high
A. speed. B. rate of vibration. C. both of these D. neither of these
According to the textbook, world food production has increased primarily by expanding the amount of land devoted to agriculture
Indicate whether the statement is true or false.
Engineers of the Trans-Alaska Pipeline had to take into account all of the following except
A. the need to cross hundreds of streams. B. earthquakes. C. permafrost. D. tornados.