Noticing large amounts of algal growth in her small farm pond, a farmer adds about 20 grass carp to feed on the abundant algae and plants. After several years, the carp grow large, exceeding 20 pounds each in size
Late one summer, the farmer notices that the carp and most of the other fish are dead. The water also smells very bad. Which one of the following is the most likely explanation for the death of these fish? A) The algae overgrew the pond and produced toxic levels of ozone.
B) The large carp grew so large that they could not get enough oxygen.
C) Bacteria feeding on the large volume of carp feces depleted the oxygen.
D) Carbon dioxide released by the carp and algae eventually suffocated the fish in the pond.
C
You might also like to view...
As a result of cold currents, July SST's are coldest
A) along the equator.
B) along the axis of the Atlantic Ocean.
C) on the east coasts of continents.
D) on the west coasts of continents.
Which of the following correctly relates the becquerel to the curie?
A) 3.7 x 10^10 Bq = 1 Ci B) 3.7 x 10^7 Bq = 1 Ci C) 2.7 x 10^-8 Bq = 1 Ci D) 2.7 x 10^-11 Bq = 1 Ci
____________________ refers to the volume of pore space in rock in proportion to the total volume of rock material
Fill in the blank(s) with correct word
The use of strip cropping helps to control soil erosion by
A. reducing leaching. B. increasing the cation exchange capacity. C. increasing saltation. D. reducing runoff.