Give Reasons:
a. An ecosystem is a dynamic community comprising populations of plants, animals,microorganisms,and the non living environment interacting together as a functional unit.
b. Every plant and animal species, no matter how big or small , depends to some exents on another plant or animal species for its survival.
c Pyramid of energy is the only pyramid that is always upright.
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Answers
Answer:
Rolling resistance is the friction, that comes into play, when a book, kept on a collection of cylindrical pencils, is moved by pushing it. Rolling resistance, also called rolling friction or, is the force resisting the motion when a body rolls on a surface.
a. "'Ecosystem' means a dynamic complex of plant, animal and micro-organism communities and their non-living environment interacting as a functional unit." ... Ecosystem processes are often non-linear, and the outcome of such processes often shows time-lags. The result is discontinuities, leading to surprise and uncertainty.
b. Every plant and animal species, no matter how big or small, depends to some extent on another plant or animal species for its survival. ... There are many types of animals that will eat the products of the photosynthesis process. Examples are deer eating shrub leaves, rabbits eating carrots, or worms eating grass.
c. Pyramid of energy is the only type of ecological pyramid, which is always upright because the energy flow in a food chain is always unidirectional. Also, with every increasing trophic level, some energy is lost into the environment and never goes back to the sun.