Why do ecologists favor the term food web as opposed to food chain?
What will be an ideal response?
Ecological systems are far more complex than simple linear chains. Feeding relationships and energy flow among interacting organisms usually take many paths in a community. For instance, grasses are food for a variety of animals such as deer, mice, and rabbits. Birds eat a variety of insects, spiders, and berries. Soil bacteria decompose a variety of dead plants and animals.
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During dry periods, most of the water flowing into streams is supplied by
A) overland flow. B) groundwater. C) rainfall. D) storms.
The main layers of the Earth in correct order, from the surface moving down is:
a) upper core, outer core, inner core, mantle b) outer core, inner core, upper mantle, lower crust c) crust, mantle, outer core, inner core d) upper mantle, lower mantle, inner core, crust
Which of the following are identical in DNA and RNA?
A) the helical structure B) the identity of the bases C) the identity of the sugar D) the sugar to phosphate linkages
Dumping lawn clippings into a stream will reduce this
A. biochemical oxygen demand. B. flow rate. C. dissolved oxygen. D. dissolved nitrogen.