Why is the total biomass of secondary consumers normally less than that of primary consumers?
What will be an ideal response?
Only about 10% of the energy from one trophic level passes on to the next.
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The survival of most organisms is immediately threatened if they live at the site of a catastrophic forest fire, volcanic eruption, or dust storm. These events, however, can launch soot, ash, or dust into different levels of the atmosphere, measurably lowering available sunlight at locations thousands of miles from the site. The are most quickly and strongly impacted at these distances, with lack of growth and reproduction.
A. autotrophs, such as crops and woodlands B. heterotrophs, such as humans and livestock C. deep-sea thermal vent communities D. All of the answer choices are correct. E. All of the organisms in domain Bacteria.
Remodeling units
What will be an ideal response?
The Permian mass extinction is associated with ________
A) an asteroid impact B) global warming C) the formation of Pangaea D) the diversification of mammals
Which group of organisms does not depend directly on sunlight for energy? I. Terrestrial producers II. Animal consumers III. Decomposers
A. I only B. II and III only C. II only D. III only E. I and III