question_answer38) Why is improper disposal of waste a curse to environment?
View Answer play_arrowquestion_answer39) Write the common food chain of a pond ecosystem.
View Answer play_arrowquestion_answer40) What are the advantages of cloth bags over plastic bags during shopping?
View Answer play_arrowquestion_answer41) Why are crop fields known as artificial ecosystem?
View Answer play_arrowquestion_answer44) Explain the role of decomposers in the environment.
View Answer play_arrowquestion_answer45) Select the mis-matched pair in the following and correct it.
(a)Bio-magnification | Accumulation of chemicals at the successive trophic levels of a food chain |
(b)Ecosystem | Biotic components of environment |
(c) Aquarium | A man-made ecosystem |
(d) Parasites | Organsims which obtain food from other living organisms |
question_answer46) We do not clean ponds or lakes, but an aquarium needs to be cleaned . Why?
View Answer play_arrowquestion_answer47) Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify.
View Answer play_arrowquestion_answer49) Suggest any four activities in daily life which are eco-friendly.
View Answer play_arrowquestion_answer50) Give two differences between food chain and food web.
View Answer play_arrowquestion_answer52) Suggest suitable mechanism(s) for waste management in fertilizer industries.
View Answer play_arrowquestion_answer54) Explain some harmful effects of agricultural practices on the environment.
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