Question
Explain briefly the ‘rivet popper hypothesis’ of Paul Ehrlich.

Answer

Paul Ehrlich proposed Rivet popper hypothesis to show the effect of biodiversity loss on the ecosystem. An airplane (ecosystem) has thousands of rivets. Popping of rivets (causing a species to become extinct) by passenger may not affect flight safety (Proper functioning of the ecosytem) in the beginning but the plane will become dangerously weak over a period of time. Removal of a rivet of a critical part like wing (key species that derive major ecosystem functions) is obviously a more serious threat to flight safety than loss of a few rivets on the seats or window inside the plane.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What are hallucinogens? Give two examples. Mention their clinical use, if
any.
Differentiate between:
  1. Predator and parasite.
  2. S-Shaped and J-Shaped growth curve.
  1. Explain the process of spermatogenesis in humans.
  2. Draw a human sperm and label acrosome and middle piece. Mention their functions.
The graph given below shows the variation in the levels of ovarian hormones during various phases of menstrual cycle:

Compare the role of A and B.

Answer the following questions:
Seeds offer several advantages to angiosperms. Describe any three such advantages.
(i) Define the cross-pollination.
(ii) Give one example each of aluminious, exalbuminous, perispermic seeds.
(iii) Draw a well labelled diagram showing the growth of pollen tube in longitudinal section of pistil.
Explain double fertilisation and trace the post-fertilisation events in sequential order leading to seed formation in a typical dicotyledonous plant.
Work out a typical Mendelian dihybrid cross and state the law that he derived from it.
Using a flow chart explain the process of decomposition. List the factors which affect this process.
Prashant's mother is suffering from a disorder for which doctor suggests her to take insulin injections. But his mother declines as she presumes injections are prepared by slaughtering of animals. Doctor smiled and explained him about the genetically engineered human insulin produced these days. He also convinced her to take injections.
  1. Name the bacterium that is used to produce human insulin.
  2. Name the company that first produced human insulin.
  3. Name the disease that is treated by using human insulin.
  4. What values are shown by the doctor?