a ) Name two examples of each biodegradable and nonbiodegradable pollutants
B ) what are the two things moving through an ecosystem
C) what is ecosystem
D) define food web
E ) why are Bacteria and fungi called decomposers
a ) Name two examples of each biodegradable and nonbiodegradable pollutants
B ) what are the two things moving through an ecosystem
C) what is ecosystem
D) define food web
E ) why are Bacteria and fungi called decomposers
A) 1. Biodegradable pollutants:
Those pollutants which can be broken down into simpler, harmless, substances in nature in due course of time (by the action of micro-organisms like certain bacteria) are called biodegradable pollutants. Domestic wastes (garbage), urine, faecal matter, sewage, agriculture residues, paper, wood, cloth, cattle dung, animal bones, leather, wool, vegetable stuff or plants are biodegradable pollutants.
2. Non-biodegradable pollutants:
Those pollutants which cannot be broken down into simpler, harmless substances in nature, are called non-biodegradable pollutants. DDT, plastics, polythene, bags, insecticides, pesticides, mercury, lead, arsenic, metal articles like aluminum cans, synthetic fibres, glass objects, iron products and silver foils are non-biodegradable pollutants.
B)the two things moving through an ecosystem are Energy and Matter.
C) An ecosystem is the sum of both the living (biotic) and nonliving (abiotic) components of a natural community. The process of energy flows and nutrient cycles make it possible for both the biotic and abiotic elements to work together. In short, an ecosystem is an interaction and sometimes a symbiosis that permits organisms to exist in limited spaces. Energy, air, water, soil, soil minerals, and nitrogen are all important components of an ecosystem. External factors also matter in how an ecosystem exists and prospers. Climate, topography, time, biota, and the parent material all affect the ecosystem in some way.
D)Food Web- A network of food chains or feeding relationships by which energy and nutrients are passed on from one species of living organisms to another
E)Bacteria and fungi are called decomposers because they decompose Complex molecules into soluble organic molecules which are absorbed in the soil which will be later used by the plants again to fulfill its nutrient requirement.
the advantages of decomposers are
1.they keep the environment clean by decomposing the dead animals.
2. it prevents spread of diseases caused by dead bodies of plants and animals like bird flu
3. they help in making hummus
1. Biodegradable pollutants:
Those pollutants which can be broken down into simpler, harmless, substances in nature in due course of time (by the action of micro-organisms like certain bacteria) are called biodegradable pollutants. Domestic wastes (garbage), urine, faecal matter, sewage, agriculture residues, paper, wood, cloth, cattle dung, animal bones, leather, wool, vegetable stuff or plants are biodegradable pollutants.
2. Non-biodegradable pollutants:
Those pollutants which cannot be broken down into simpler, harmless substances in nature, are called non-biodegradable pollutants. DDT, plastics, polythene, bags, insecticides, pesticides, mercury, lead, arsenic, metal articles like aluminum cans, synthetic fibres, glass objects, iron products and silver foils are non-biodegradable pollutants.
B)the two things moving through an ecosystem are Energy and Matter.
D)Food Web- A network of food chains or feeding relationships by which energy and nutrients are passed on from one species of living organisms to another
E)Bacteria and fungi are called decomposers because they decompose Complex molecules into soluble organic molecules which are absorbed in the soil which will be later used by the plants again to fulfill its nutrient requirement.
the advantages of decomposers are
1.they keep the environment clean by decomposing the dead animals.
2. it prevents spread of diseases caused by dead bodies of plants and animals like bird flu
3. they help in making hummus
