Question
What does an Ecological Pyramid indicate? Explain the three different types of Upright Pyramids in nature with the help of an example of each.
✓
Answer
An ecological pyramid is the graphic representation of the number, food/ energy relationship or biomass of the different trophic levels of a food chain at a given time.
- In general the pyramids of number, of biomass and of energy are upright.
- It is because the producers are more in number and biomass than the herbivores and the herbivores are more in number and biomass than the carnivores.
- The pyramid of energy in any ecosystem is always upright because energy at the producer level is the highest and decreases at successive higher trophic levels; when energy flows from one trophic level to the next, higher trophic level, some amount of energy is lost as heat and only 10% of the energy is transferred.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Ranjana and Shilpi had a hot argument whether or not life is still originating on the earth today. Their neighbour, Mr. Kamal Mishra, a retired professor, who happened to be listening to the girls, called them and explained the matter in detail.
- As a student of biology, what is your answer to the above problem? And why?
- Recall the experiment of Miller, which simulated the primitive atmosphere.
- What were the products obtained in his experiment?
- How was energy provided in the experiment?
- What would have been the energy source for origin of life on the earth?
- Indicate the values shown by Mr. Kamal Mishra?
Give an account of Hershey and Chase experiment. What did it conclusively prove? If both DNA and proteins contained phosphorus and sulphur do you think the result would have been the same?
- Explain with the help of Griffith's experiment, how the search for genetic material was conducted and what was the conclusion drawn.
- How did Mac Leod, Mc Carty and Avery establish the Biochemical nature of the socalled. "genetic material' identified by Griffith in his experiments?
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.
- Name the bacterium that is used to produce human insulin.
- Name the company that first produced human insulin.
- Name the disease that is treated by using human insulin.
- What values are shown by the doctor?
Write the differences in following-
(a) Write the causes of cancer.
(b) Explain Cancer detection
(c) Write the characters of cancer cells
(d) Write the types of cancer
(a) Write the causes of cancer.
(b) Explain Cancer detection
(c) Write the characters of cancer cells
(d) Write the types of cancer
Who revealed biochemical nature of the transforming principle? How was it done?
Observe the representation of genes involved in the lac operon given below.
- Identify the region where the repressor protein will attach normally.
- Under certain conditions repressor is unable to attach at this site. Explain.
- If repressor fails to attach to the said site what products will be formed by z, y and a?
- Analyse why this kind of regulation is called negative regulation.
What do you understand by chromosomal disorders? Describe the following genetic disorders giving reasons and relative abnormalities.
(a) Down's Syndrome
(b) Klinefelter's Syndrome
(c) Turner's Syndrome
(a) Down's Syndrome
(b) Klinefelter's Syndrome
(c) Turner's Syndrome
Explain the process of protein synthesis from processed mRNA.
Discuss why Drosophila has been used extensively for genetical studies.