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Neet Biology Ecosystem Mcq
Quiz 15
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Q.1
Which of the following process helps in nutrient conservation?
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a) Mineralisation
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b) Immobilisation
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c) Leaching
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d) Nitrification
Explanation
Answer : (b)
Q.2
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.... [AIPMT 2014]
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a) A: Detritus; B: Rock minerals; C: Producer; D: Litter fall
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b) A:Producers; B: Litter fall C: Rock minerals; D:Detritus
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c) A: Rock minerals; B:Detritus; C: Litter fall; D:Producers
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d) A:Litter fall; B: Producers; C:Rock minerals; D:Detritus
Explanation
Answer:(a)
Q.3
In an ecosystem the rate of production of organic matter during photosynthesis is termed as : …[AIPMT 2015]
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a) Net productivity
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b) Net primary productivity
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c) Gross primary productivity
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d) Secondary productivity
Explanation
Answer:(c)
Q.4
Secondary Succession takes place on/in : …[AIPMT 2015]
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a) Newly cooled lava
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b) Bare rock
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c) Degraded forest
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d) Newly created pond
Explanation
Answer:(c)
Q.5
The mass of living material at a trophic level at a particular time is called : …[AIPMT 2015]
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a) Standing crop
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b) Gross primary productivity
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c) Standing state
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d) Net primary productivity
Explanation
Answer:(a)
Q.6
A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called:- …[AIPMT-2016]
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a) Ley farming
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b) Contour farming
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c) Strip farming
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d) Shifting agriculture
Explanation
Answer:(a)
Q.7
Which of the following is a characteristic feature of cropland ecosystem ? …[AIPMT-2016]
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a) Absence of soil organisms
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b) Least genetic diversity
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c) Absence of weeds
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d) Ecological succession
Explanation
Answer:(b)
Q.8
The term ecosystem was coined by …[AIPMT-2016]
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a) E.P. Odum
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b) A.G. Tansley
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c) E. Haeckel
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d) E. Warming
Explanation
Answer:(b)
Q.9
Which of the following would appear as the pioneer organisms on bare rocks? …[AIPMT-2016]
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a) Lichens
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b) Liverworts
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c) Mosses
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d) Green algae
Explanation
Answer:(a)
Q.10
Natural reservoir of phosphorus is …[NEET 2013]
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a) Sea water
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b) Animal bones
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c) Rock
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d) Fossils
Explanation
Secondary productivity is rate of formation of new organic matter by consumer. Answer:(c)
Q.11
Which one of the following processes during decomposition is correctly described?... [NEET 2013]
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a) Fragmentation - Carried out by organisms such as earthworm
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b) Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate
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c) Catabolism - Last step in the decomposition under fully anaerobic condition
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d) Leaching - Water soluble inorganic nutrients rise to the top layers of soil
Explanation
Fragmentation is one of the steps during decomposition, in which detritus is converted into small fragments. Answer:(a)
Q.12
The primary producers of the deep-sea hydrothermal vent ecosystem are ...
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a) Blue-green algae
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b) Coral reefs
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c) Green algae
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d) Chemosynthetic bacteria
Explanation
Answer:(d)
Q.13
Which ecosystem has the maximum biomass? ….[NEET- 2017]
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a) Forest ecosystem
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b) Grassland ecosystem
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c) Pond ecosystem
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d) Lake ecosystem
Explanation
High productive ecosystem are – Tropical rain forest – Coral reef – Estuaries – Sugarcane fields Answer:(a)
Q.14
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in : ….[NEET- 2017]
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a) Tropical Savannah
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b) Tropical Rain Forest
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c) Grassland
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d) Temperate Forest
Explanation
The tropical rain forest have five vertical strata on the basis of height of plants. i.e., ground vegetation, shrubs, short canopy trees, tall canopy trees and tall emergent trees. Answer:(b)
Q.15
ost animals that live in deep oceanic waters are... [ ReAIPMT 2015]
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a) Detritivores
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b) Primary consumers
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c) Secondary consumers
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d) Tertiary consumers
Explanation
Answer:(a)
Q.16
An association of individuals of different species living in the same habitat and having functional interactions is... [ ReAIPMT 2015]
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a) Population
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b) Ecological niche
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c) Biotic community
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d) Ecosystem
Explanation
Answer:(c)
Q.17
In which of the following both pairs have correct combination ... [ ReAIPMT 2015]
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a) Gaseous nutrient cycle → Sulphur and Phosphorus Sedimentary nutrient cycle → Carbon and Nitrogen
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b) Gaseous nutrient cycle → Carbon and Nitrogen Sedimentary nutrient cycle → Sulphur and Phosphorus
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c) Gaseous nutrient cycle → Carbon and sulphur Sedimentary nutrient cycle → Nitrogen and phosphorus
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d) Gaseous nutrient cycle → Nitrogen and sulphur Sedimentary nutrient cycle → Carbon and Phosphorus
Explanation
Answer:(b)
Q.18
During ecological succession ...[ ReAIPMT 2015]
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a) the changes lead to a community that is in near equilibrium with the environment and is called pioneer community
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b) the gradual and predictable change in species composition occurs in a given area
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c) the establishment of a new biotic community is very fast in its primary phase
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d) the number and types of animals remain constant
Explanation
Answer:(b)
Q.19
Natality refers to ... ... [NEET 2018]
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a) Death rate
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b) Birth rate
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c) Number of individuals leaving the habitat
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d) Number of individuals entering a habitat
Explanation
Answer : (b)
Q.20
What type of ecological pyramid would obtained with the following data ? [NEET 2018] Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g
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a) Inverted pyramid of biomass
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b) Pyramid of energy
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c) Upright pyramid of numbers
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d) Upright pyramid of biomass
Explanation
Answer : (a)
0 h : 0 m : 1 s
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