JOIN ADRE 2.0 Telegram Group

NCERT - Class 12 Biology Questions and Answers from Chapter "Ecosystem" | GkSeries

Questions
16 Littoral zone is located along the
1 High mountains
2 Sea
3 Rivers
4 Desert

Answer: Sea
17 Gradual and predictable changes in the species composition of a given area is
1 Primary succession
2 Ecological succession
3 Xerarch succession
4 Secondary succession

Answer: Ecological succession
Advertisement
Article and Schedule Quiz Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

18 Trophic levels are formed by
1 Only plants
2 only animals
3 Only carnivorous
4 Organisms linked in food chain

Answer: Organisms linked in food chain
19 The Biosphere consists of the following
1 Lakes
2 Soils
3 Solid sediments
4 All of the above

Answer: All of the above
20 Which one of the following correctly represents an organism and its ecological niche?
1 Vallisneria and pond
2 Desert locust (Schistocerca) and desert.
3 Plant lice (aphids) and leaf
4 Vultures and dense forestNone of these

Answer: Plant lice (aphids) and leaf
21 Biotic potential is counteracted by
1 Competition with other organisms
2 Producer is the largest
3 Limitation of food supply
4 None of the above

Answer: None of the above
22 About 70% of total global carbon is found in
1 Forests
2 Grasslands
3 Agroecosystems
4 Oceans

Answer: Oceans
23 The term ‘Ecosystem’ was coined by
1 Odum
2 Clements
3 Arthur G. Tansley
4 Elton

Answer: Elton
24 The food chain, in which the microorganisms breakdown the energy-rich organic compounds prepared by the producers, is known as
1 Detritus food chain
2 Predator food chain
3 Parasitic food chain
4 Ecosystem

Answer: Detritus food chain
25 Definition of ecosystem is
1 The community of organisms together with the environment in which they live
2 The abiotic component of a habitat
3 The part of the earth and its atmosphere which inhibits living organisms
4 A community of organisms interacting with one another

Answer: The community of organisms together with the environment in which they live
26 In a lake, phytoplankton grow in abundance in
1 Littoral zone
2 Limnetic zone
3 Profundal zone
4 Benthic region

Answer: Limnetic zone
27 The maximum biomass occurs in
1 Tropical forests
2 Temperate forests
3 Taiga
4 Alpine vegetation

Answer: Tropical forests
28 Mass of living matter at a trophic level in an area at any time is called
1 Standing state
2 Standing crop
3 Detritus
4 Humus

Answer: Standing crop
29 Animals living at the bottom of the sea are known as
1 Lentic
2 Pelagic
3 Benthic
4 Lotic

Answer: Benthic
30 Identify the possible link "A" in the following food chain: Plant → insect → frog → "A" → Eagle
1 Cobra
2 Parrot
3 Rabbit
4 Wolf

Answer: Cobra

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement