CBSE Class 10 Biology Our Environment MCQs Set A

Question. Which of the following constitutes a food chain ?
(a) Grass, Wheat and Mango
(b) Grass, Goat and Human
(c) Goat, Cow and Elephant
(d) Grass, Fish and Goat

Answer : B

Question. In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic

Answer : A

Question. Which of the following represents a possible food chain found in a pond : Primary Primary Secondary producers consumers consumers
(a) green algae fish mosquito larvae
(b) fish green algae mosquito larvae
(c) mosquito larvae fish green algae
(d) green algae mosquito larvae fish

Answer : D

Question. Which of the following are decomposers of dead organisms ? Bacteria Fungi Viruses
(a) no yes yes
(b) yes no yes
(c) yes yes no
(d) yes yes yes

Answer : C

Question. Which of the following is an artificial ecosystem ?
(a) pond
(b) crop field
(c) lake
(d) forest

Answer : B

Question. Disposable plastic plates should not be used because :
(a) they are made of light weight materials
(b) they are made of toxic materials
(c) they are made of biodegradable materials
(d) they are made of non-biodegradable materials

Answer : D

Question. In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers

Answer : A

Question. Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as :
(a) eutrophication
(b) pollution
(c) biomagnification
(d) accumulation

Answer : C

Question. One of the following is not a biodegradable material. This one is :
(a) cotton
(b) animal bones
(c) aluminium foil
(d) wood

Answer : C

Question. Which of the following is not a non-biodegradable material ?
(a) nylon socks
(b) plastic school bag
(c) jute carry bag
(d) polyester clothes

Answer : C

Question. The use of one of the following will pollute the environment. This one is :
(a) paper carry bags
(b) cotton cloth carry bags
(c) nylon cloth carry bags
(d) jute carry bags

Answer : C

Question. One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator

Answer : C

Question. Which of the following is not a producer ?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy

Answer : B

Question. Only ____ % of the energy can be transferred from one trophic level to the next trophic level.
(a) 1
(b) 5
(c) 10
(d) 20

Answer : C

Question. Accumulation of non- biodegradable pesticides in different trophic levels is called
(a) Biological degradation
(b) Biological magnification
(c) Biological concentration
(d) Biological deposition

Answer : B

Question. The UV radiation from the sun is likely to cause _____________ in human
(a) Skin cancer
(b) Lung cancer
(c) Liver Cancer
(d) Brain Cancer

Answer : A

Question. Replacing Plastic cups by paper cups for selling tea on train may be preferred because
(a) Paper cups are bio degradable
(b) Paper cups are cheaper
(c) Paper cups are stronger
(d) Paper cups keep things safe

Answer : A

Question. World Environment day is celebrated on
(a) July 1
(b) July 5
(c) June 1
(d) June 5

Answer : D

Question. Which one of the following is a non- biodegradable substance
(a) DDT
(b) Manure
(c) paper
(d) Cotton cloth

Answer : A

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

Answer : C

Question. Identify the proper food chain
(a) Grass ----- frog ---- insect ----- snake
(b) Grass---- insect ----- frog ------ snake
(c) Insect --- frog ---- grass ---- snake
(d) Grass --- frog ---- snake ----- insect

Answer : B

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

Answer : C

Question. The best way to dispose waste is by
(a) Making a paste of all domestic waste and putting them in a river
(b) Separating biodegradable and nonbiodegradable waste before disposing in bins
(c) Throw the waste on road side
(d) Dumping all domestic waste in litter bin

Answer : B

Question. One of the following is a micro-consumer. This one is :
(a) ant
(b) lice
(c) fungi
(d) mosquito

Answer : C

Question. Which of the following act as decomposers in an ecosystem ?
(a) Lactobacillus bacteria
(b) Cyanobacteria
(c) Putrefying bacteria
(d) Rhizobium bacteria

Answer : C

Question. Which of the following is the full form of CFC?
(a) Chlorofluorine carbon
(b) Carbonchlorofluorine
(c) Chlorinfluid carbon
(d) Chlorofluorocarbon
Answer : D

Question. Which of the following is not an example of abiotic factors?
(a) Light
(b) Plants
(c) Heat
(d) Temperature
Answer : B

Question. By which way autotrophs convert energy of food?
(a) Solar energy to chemical energy
(b) Bio-gas to chemical energy
(c) solar energy to bio-gas
(d) Chemical energy to solar energy
Answer : A

Question. Which of the following is proper sequence of trophic levels?
(a) Producers, Herbivores, Top carnivores, Carnivores
(b) Top Carnivores, Carnivores, Herbivores, Producers
(c) Carnivores, Top Carnivores, Producers, Herbivores
(d) Herbivores, Carnivores, Producers, Top Carnivores
Answer : B

Question. Which of the following is the full form of UNEP?
(a) United Kingdom of Africa
(b) United State of America
(c) United Nations Environment programme
(d) Union English programme
Answer : C

Question. Which of the following is an example of producers?
(a) Plastic pens
(b) Plastic cans
(c) Polythene
(d) Green plants
Answer : D

Question. Which of the following is not a biodegradable pollutant?
(a) Paper
(b) Cotton cloth
(c) Cotton
(d) DDT
Answer : D

Question. Which of the following actions may not affect the environment in worse?
(a) Plastic bags buried inside the earth.
(b) Planting of trees
(c) Excessive use of non-biodegradable pesticides
(d) Burning of plastic bags.
Answer : B

Question. Which of the following is an example of human made ecosystem?
(a) Aquarium
(b) Sunlight
(c) Wind
(d) Water
Answer : A

Question. Which of the following is terrestrial ecosystem?
(a) A natural forest
(b) A lake
(c) A pond
(d) An aquarium
Answer : A

Question. Which of the following is an example of food chain?
(a) Grass → Deer → Lion
(b) Algae → Diatoms → Fish
(c) Fish → Deer → Algae
(d) Grass → Frog → Birds
Answer : A

Question. Which of the following is the formula of ozone?
(a) O3
(b) O2
(c) O4
(d) O6
Answer : A

Question. Which of the following in not an effect of ultraviolet radiations?
(a) Causes skin cancer
(b) Causes sun burn
(c) Causes eye disease
(d) Causes typhoid
Answer : D

Question. Which of the following is omnivore?
(a) Lion
(b) Hawks
(c) Jackal
(d) Man
Answer : D

Question. Which of the following belong to same trophic level?
(a) Cockroach and spider
(b) Lizard and spider
(c) Hawk and spider
(d) Lizard and hawk.
Answer : D

Question. What is the nature of ozone?
(a) It is deadly poisonous
(b) It is fragrant
(c) It is smooth
(d) It causes purple smoke
Answer : A

Question. Which of the following are environment-friendly practices?
(a) Carrying cloth-bags to put purchases in while shopping
(b) Switching off unnecessary lights and fans
(c) Walking to school instead of getting your mother to drop you on her scooter
(d) All of the above
Answer : D