CBSE Class 10 Biology Our Environment MCQs Set C

Question : Food web is
(a) Food served through websites
(b) Display of different food items
(c) Using food items for a fashion dress
(d) Interlinked food chains
Answer : D

Question : Identify the proper food chain
(a) Grass, insect , frog , snake
(b) Grass , frog , insect , snake
(c) Insect , frog , grass , snake
(d) Grass , frog , snake , insect
Answer : A

Question : In a terrestrial ecosystem the biomass of ____________ should be the most
(a) Producer
(b) Herbivore
(c) Carnivore
(d) Any one of the above
Answer : A

Question : Which one of the following is a non- biodegradable substance
(a) Manure
(b) Paper
(c) DDT
(d) Cotton cloth
Answer : C

Question. In the following groups of materials, which group(s) contains only non biodegradable items?
I. Wood, paper, leather
II. Polythene, detergent, PVC
III. Plastic, detergent, grass
IV. Plastic, bakelite, DDT
(a) III
(b) IV
(c) I and III
(d) II and IV
Answer : D

Question. Complete the given analogy. Non-biodegradable : _________ :: Biodegradable : Livestock wastes
(a) Cotton
(b) Grass
(c) Glass
(d) Orange peel
Answer : C

Question. Which of the following is an abiotic component of an ecosystem?
(a) Bacteria
(b) Plants
(c) Fungi
(d) Humus
Answer : D

Question. According to Charles Elton, which is not correct?
(a) Carnivores at the top of the pyramid.
(b) Producers at the top of the pyramid.
(c) Energy trapping is high at the top of the pyramid.
(d) Both (b) and (c)
Answer : D

Question. Now-a-days, which type of cups are being generally used in trains for serving tea/coffee/ soup etc. on daily basis?
(a) Washable glass cups
(b) Washable plastic cups
(c) Disposable paper cups
(d) Disposable cups made of plastic
Answer : C

Question. Minamata disease is due to
(a) MIC gas
(b) methyl mercury
(c) lead nitrate
(d) cobalt chloride.
Answer : B

Question. Which of the following statements is incorrect?
(a) A food chain is always straight.
(b) Producers belong to second trophic levels.
(c) Top carnivore are fourth order consumers.
(d) Consumers obtain organic nutrients from outside as food.
Answer : B

Question. Shorter food chains provide
(a) more energy
(b) less energy
(c) same energy
(d) any of these.
Answer : A

Question. Fish that feeds on zooplanktons is a
(a) primary consumer
(b) secondary consumer
(c) tertiary consumer
(d) decomposer.
Answer : B

Question. Ozone layer is essential because it absorbs most of the
(a) infrared radiations
(b) solar radiations
(c) ultraviolet radiations
(d) both (a) and (b).

Answer : C

Question. As it travels along the food chains, the concentration of DDT
(a) increases
(b) remains constant
(c) decreases
(d) fluctuates randomly.
Answer : A

Question. Select the incorrect statement.
(a) Food we eat is digested by various enzymes in our body.
(b) Non-biodegradable substances are not broken down by biological processes.
(c) All enzymes have same action on each substance.
(d) Plastics cannot be broken down by the action of bacteria and other saprophytes.
Answer : C