Question

_____________ proposed the rivet popper hypothesis.

• A. Paul Ehrlich
• B. Alexander von Humboldt
• C. Reymond Lindeman
• D. Joel Asaph Allen

Answer 1

The correct option is A Paul Ehrlich

Paul Ehrlich proposed the rivet popper hypothesis. The hypothesis explains the effect of decrease in biodiversity on the ecosystem. It is an analogy where the ecosystem is compared to an airplane and species are compared to the rivets linking the various parts of the airplane.

Alexander von Humboldt proposed the species - area relationship of an ecosystem. He obseerved that within a region, species richness increases with increasing explored area, but upto a certain limit.

Reymond Lindeman proposed the ten percent law of energy transfer. It states that only 10% of energy is transferred from one trophic level to another and the remaining 90% of the energy is lost during processes like respiration and digestion.

Joel Asaph Allen proposed the Allen’s rule which states that the limbs, ears, and other appendages of the animals living in cold climates tend to be shorter than in animals of the same species living in warm climates, to minimise heat loss. For example, polar bears have smaller ears than the grizzly bear.