Chapter 7 Energy Flow in an Ecosystem
- What are the differences between flow of matter and of energy in an ecosystem? Why? The major difference between flow of matter and of energy is that the flow of matter occurs in a cyclic manner i.e. it is recycled, however,... 3
- What type of changes occur in the amount of energy during its transfer from plants to apex consumers? (1) Green plants of the ecosystem store large amount of energy in the form of carbohydrates and proteins. (2) Before reaching the decomposer... 1
- State the different types of bio-geochemical cycles and explain the importance of those cycles. The cyclical flow of nutrients within an ecosystem is called the bio-geo-chemical cycle. There are various bio-gio-chemical cycles operating... 1
- Explain in detail the inter-relationship between the food chain and food web. Interaction go on continuously between producers, consumers and decomposers. There is a definite sequence in these interactions which is cal... 1
- What would you do to help maintain the equilibrium in the various bio-geo-chemical cycles? Explain in brief. The cyclical flow of nutrients within an ecosystem is called the bio-geo-chemical cycle. Climatic changes and human activities seriously aff... 1
- Oxygen cycle Explain the following cycles in your own words with suitable diagrams. Oxygen forms 21% of the atmosphere. It is also present in the hydrosphere and lithosphere. Circulation and recycling of oxygen within the bi... 1
- Nitrogen cycle Explain the following cycles in your own words with suitable diagrams. Nitrogen forms 78% i.e. the maximum portion of the atmosphere. It is necessary for the maintenance of the cycle of nature. The circulation a... 1
- Carbon cycle Explain the following cycles in your own words with suitable diagrams. Carbon cycle Carbon enters life forms through the process of photosynthesis. During photosynthesis, carbon dioxide and water combine to prod... 1
- Flow of nutrients through an ecosystem is cyclic. give reason Flow of nutrients through an ecosystem is cyclic as the nutrients move from one trophic level to another trophic level all the way up and th... 1
- Equilibrium is necessary in the various bio-geo-chemical cycles. give reason The cyclic flow of nutrients within an ecosystem is called as the bio-geochemical cycle. A continuous transfer of nutrients which are necess... 1
- Give reasons Energy flow through an ecosystem is ‘one way’. Sun is ultimate source of energy. The producers convert solar energy into chemical energy in the form of organic compounds. The primary cons... 2
- Correct and rewrite the following statements and justify your corrections. 1. Carnivores occupy the second trophic level in the food chain. Answer Correction-Carnivores occupy the third trophic level in the food cha... 1
- Complete the following table (Carefully study the carbon, oxygen and nitrogen cycles) Bio-geo-chemical cycles Biotic processes Abiotic processes 1. Carbon cycle Photosynthesis -Release of oxygen and Respiration - Release of ox... 2