What is a riffle?
A) the deepest part of the streambed bottom
B) a pool of water in a stream
C) an herbivorous aquatic insect
D) a fast-moving shallow body of water
Correct Answer:
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Q18: The tiny,photosynthetic,primary producers of open water such
Q19: Streams generally have a(n)_ temperature at their
Q20: Non-flowing water ecosystems,such as ponds and lakes,are
Q21: Streams are classified according to orders.If two
Q22: Which type of lake has the largest
Q24: If a stream has an average depth
Q25: Which of the following feeds on FPOM?
A)caddisflies
B)shredders
C)filtering
Q26: In ponds and lakes,the zone beneath the
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