In Japan, the presence of ducks and the aquatic fern Azolla in rice cultivation has shown that ________
A) invasive species diminish rice yields
B) ducks and other birds must be eliminated from rice fields
C) the ferns provide an excellent food for ducks
D) GM crops such as rice cannot succeed without ferns to provide shade and ducks to provide pollination
E) restoring portions of the biodiversity of a natural ecosystem increases crop yields and profits
E
You might also like to view...
The largest and most successful group of seed plants is
A. mosses. B. flowering plants. C. ferns. D. conifers.
The most useful definition of a city, rural area or village is based on
A. The geographical area B. Functions C. The land uses involved D. The size of the population E. The size of the land used
Individuals of representative families in deep water often tend to be much smaller than related individuals in the shallow ocean
Indicate whether the statement is true or false
Hurricanes die when they move over land because
A) the Coriolis force is not sufficient to sustain them over land. B) the land temperature is not warm enough to sustain the low pressure system. C) evaporation and subsequent condensation are no longer sufficient to sustain them. D) anticyclonic forces overtake the cyclonic storm.