Community Post 5053446723412- Ecology Unit.pdf

Biology at Ease
CommunityPost 50- Ecology Unit
Biology at Ease biology_at_ease Biology at Ease
NEET Biology
1. The four levels of Biological Organisation does not include –
A. Cells
B. Populations
C. Communities
D. Organisms

Biology at Ease
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2. Statement 1: Temperature is the most ecologically relevant
environmental factor.
Statement 2: The organisms that can tolerate and thrive in a wide range
of temperatures are called eurythermal.
A. Both Statement 1 and 2 are Correct
B. Both Statement 1 and 2 are Incorrect
C. Statement 1 is Correct
D. Statement 2 is Correct

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3. Statement 1: Mortality and Immigration contribute to an increase in
Population density. Statement 2: The size of a population for any species
is not a static parameter.

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4. Mark the odd one out:
A. Forest
B. Estuary
C. Grassland
D. Desert

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5. Statement 1: In our biosphere, heterogeneity exist only at species
level.
Statement 2: The term ‘Biodiversity’ was popularised by ‘Paul Ehrlich’.

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6. A group of animals of a species that live in a well-defined geographical
area, share or compete for similar resources, potentially interbreed and
thus constitute a:
A. Community
B. Biome
C. Ecosystem
D. Population

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7. If a new habitat is just being colonised, which of the following may
contribute more significantly to population growth?
A. Immigration
B. Emigration
C. Birth rates
D. Mortality

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8. Statement 1: Any species growing exponentially under limited resource
conditions can reach enormous population densities in a short time.
Statement 2: Every population in nature has at its disposal unlimited resources
to permit exponential growth.

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9. Statement 1: Vertical distribution of different species occupying
different levels is called Scarification.
Statement 2: A constant input of solar energy is the basic requirement for
any ecosystem to function and sustain.

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10. Which is not a functional unit of an ecosystem-
A. Productivity
B. Decomposition
C. Energy flow
Stratification

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11. Statement 1: In an ecosystem, there is unidirectional movement of
energy towards the lower trophic levels.
Statement 2: Decomposition is largely an oxygen-requiring process.

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12. India has….. Genetically different strains of Rice.
A More than 50,000
B. less than 50,000
C. less than 1,000
D. 50,000

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13. Robert May places the global species diversity at about-
A. 70 million
B. 7 million
C. 7 trillion
D. 7 thousand

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14. Among animals, ___ Are the most species rich taxonomic group.
A. Amphibians
B. Mammals
C. Aves
D. Insects

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15. Statement 1: A population growing in a habitat with limited resources
show initially and an asymptote followed by phases of acceleration.
Statement 2: Logistic growth model is considered a more realistic one.

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16. The rate of formation of new organic matter by consumers is called –
A. Net Primary productivity
B. Gross Primary Productivity
C. Secondary Productivity
D. Primary production

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17. Which of the following organisms breed only once in their lifetime –
A. Bamboo
B. Pacific salmon fish
C. Both a and b
D. None of the above

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18. Interspecific interactions…
A. are always beneficial
B. could be beneficial or detrimental but never neutral
C. could be beneficial or neutral but never detrimental
D. could be beneficial, neutral or detrimental

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19. India has…… percentage of world’s land area.
A. 2.4
B. 1.4
C. 8.1
D. 18

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20. Statement 1: India has nearly 45,000 species of animals and twice as
many of plants.
Statement 2: The Amazon rainforest in North America has the greatest
biodiversity on earth- it is home to more than 40,000 species of plants.

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21. In the ‘Rivet popper hypothesis’, airplane represents
A. Ecosystem
B. Species
C. Species
D. Biome

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22. IUCN Red List (2004) documents the extinction of 784 species
including -
A. 328 species of vertebrates
B. 259 species of Invertebrates
C. 77 species of Plants
D. None of the above

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23. Statement 1: Both the species benefit in mutualism.
Statement 2: In amensalism, one species is harmed whereas the other is
unaffected.

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24. Statement 1: Preys act as ‘conduits’ for energy transfer across trophic
levels.
Statement 2: Predators help in maintaining species diversity in a
community, by reducing the intensity of competition among competing
prey species.

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25. The extinction of ‘Steller’s sea cow’ is a result of:
A. Over-exploitation
B. Co-extinctions
C. Alien species invasions
D. Habitat loss & Fragmentation

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26. ___ Is the raw material for decomposition.
A. Fresh Plants
B. Herbivores
C. Detritus
D. Soil

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27. Statement 1: Catabolism is the process in which water soluble
inorganic nutrients go down into the soil horizon and get precipitated
as unavailable salts.
Statement 2: The rate of decomposition is controlled by chemical
composition of detritus and climatic factors.

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28. Presence of special chemical in the body of monarch butterfly is
attributable to its protection. When does it obtain this chemical?
A. When the predator hunts
B. It is present in the body by birth
C. By feeding on a poisonous weed during its caterpillar stage
D. When it enters the gut of the Predator, the Enzymes in its body gets
activated

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29. Statement 1: Totally unrelated species never compete for the same
resource.
Statement 2: In general, herbivores and plants appear to be more
adversely affected by competition than carnivores.

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30. The narrowly utilitarian arguments for biodiversity conservation
includes:
A. The aesthetic pleasures of walking through thick woods
B. Ecosystem services like Photosynthesis
C. Products of Medicinal importance
D. All of the above

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31. Species confined to a particular region and not found anywhere else
are called –
A. Endangered species
B. Endemic species
C. Extinct species
D. Migrating species

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32. The organisms that feed on herbivores are called
A. Producers
B. Primary consumers
C. Decomposers
D. Primary Carnivores

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33. Of the total incident solar radiation the proportion of PAR is:
A. More than 75%
B. Less than 50%
C. 70-75%
D. 2-10%

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34. Extinction of Abingdon tortoise in Galapagos Islands was due to :
A. Competition
B. Over-exploitation
C. Habitat loss and fragmentation
D. Parasitism

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35. Interaction between Sea anemone and Clown fish is an example of:
A. Commensalism
B. Amensalism
C. Mutualism
D. Parasitism

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36. Statement 1: There are 34 Biodiversity hotspots in India.
Statement 2: All the biodiversity hotspots put together cover more than
20% of the earth’s land area.

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37. Mark the incorrect match with respect to their numbers in India –
A. National parks – 190
B. Biosphere reserves – 14
C. Hotspots-3
D. Wildlife sanctuaries - 448

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38. Statement 1: In a particular climatic condition, decomposition rate is
slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich
in nitrogen and water-soluble substances like sugars.
Statement 2: Decomposition is largely an oxygen-requiring process.

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39. Statement 1: Producers in an aquatic ecosystem are various species
like zooplankton, algae and higher plants.
Statement 2: A grazing food chain begins with dead organic matter.

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40. Statement 1: Organisms at each trophic level depend on those at the
lower trophic level for their energy demands.
Statement 2: Mycorrhiza represents an intimate mutualistic relationship
between a fungus and algae or cyanobacteria.

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Answers
NEET Biology
1)A
2)A
3)D
4)B
5)B
6)D
7)A
8)B
9)D
10)D
11)D
12)A
13)B
14)D
15)D
16)C
17)C
18)D
19)A
20)B
21)A
22)D
23)A
24)D
25)A
26)C
27)D
28)C
29)D
30)C
31)B
32)D
33)B
34)A
35)A
36)B
37)A
38)A
39)B
40)C

Community Post 5053446723412- Ecology Unit.pdf

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