Plastics that wash into waterways cause problems mainly because they:

a. clog gills of fish
b. are mistaken for food by marine animals
c. are unsightly
d. leach toxins
e. disturb water flow patterns


b

Biology & Microbiology

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Which one of the following ecosystems is most likely to show an inverted biomass pyramid but a normal energy pyramid? 

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A low to moderate fever in an otherwise healthy person should be treated immediately with antipyretic drugs.

Answer the following statement true (T) or false (F)

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Figure 4.23A The structure labeled A in the accompanying figure ____.

A. prevent movement of materials between cells B. are found in tissues subjected to stretching C. allow the free passage of materials between cells D. are found mostly in heart muscle E. are found in most tissues except in the stomach

Biology & Microbiology