Long Answer TypeIt is often said that the pyramid of energy is always upright. On the other hand, the pyramid of biomass can be both upright and inverted. Explain with the help of examples and sketches.
Short Answer TypeConstruct an age pyramid which reflects an expanding growth status of human population.
State the function of a reservoir in a nutrient cycle. Explain the simplified model of carbon cycle in nature.
Long Answer Type(a) Explain the significance of ecological pyramids with the help of an example.
(b) Why are the pyramids referred to as upright or inverted?Short Answer TypeLong Answer Type(a) Taking an example of a small pond explain how the four components of an ecosystem function as a unit.
(b) Name the type of food chain that exists in a pond.
Short Answer TypeIn in a food-chain, a trophic level represents a functional level, not a species. Explain.
In a food chain one trophic level is occupied by more than one species. On the basis of sources of their nutrition, organisms occupy a specific position in the food chain called their trophic level. For example, in a grassland ecosystem, rabbits and insects occupy the same trophic level, while both are different species. Therefore one trophic contains more than one species and is a functional level of different species rather than only one. Thus the trophic level cannot be represented by a species.
Long Answer TypeDiscuss the role of healthy ecosystem services as a prerequisite for a wide range of economic, environmental and aesthetic goods and services.
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