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JIMPER Biology - Ecology and Environment Model Question Paper with Answer

Biology - Ecology and Environment

Exam Duration: 45 Mins Total Questions : 30

1 )

Which one of the following correctly represents an organism and tis ecological nicher?

(a)
Vallisneria and pond
(b)
Desert locust (Scistocerca) and desert
(c)
Plant lice (aphids) and leaf
(d)
Vultures and dense forest

2 )

The percentage ratio of natality over moratlity is

(a)
population dynamics
(b)
vital index
(c)
population of density
(d)
total count

3 )

The pyramid of energy is always

(a)
inverted
(b)
upright
(c)
Both (a) and (b)
(d)
inverted in forest ecosystem

4 )

The species that invade a bare area are called

(a)
hydrophytic species
(b)
xerophytic species
(c)
mesophytic species
(d)
pioneer species

5 )

A biologist studied the population of rats in a form. He found that the average natality was 250, average mortality was 240, immigration 20, emmigrtion was 30. The net increase in population is

(a)
15
(b)
05
(c)
0
(d)
10

6 )

Special kinds of roots called pneumatophores are characteristics of the plants growing in

(a)
Sandy soils
(b)
Saline soils
(c)
Marshy places and salt lakes
(d)
Dry land

7 )

Territoriality occurs as a result of

(a)
Parasitism
(b)
Predation
(c)
Cooperation
(d)
Competition

8 )

Ratio between mortality and natality is

(a)
Population ratio
(b)
Census proportion
(c)
Vital index
(d)
Density coefficient

9 )

An animal species was found to have a wide tolerance towards salinity and habitat conditions but narrow towards temperature conditions. Which of these statements express the said species correctly?

(a)
Stenothermal, euryhaline and euryecious.
(b)
Eurythermal, stenohaline and stenophagic.
(c)
Eurythermal euryhydric and stenoecious.
(d)
Stenophagic, euryhaline and eurythermal.

10 )

The relationship between a fungus and cyano bacterium in Lichens is an example of

(a)
Commensalism
(b)
Mutualism
(c)
Parasitism
(d)
Amensalism

11 )

Tropical rainforest, deciduous forest sea coast, desert etc are the major

(a)
Populations
(b)
Communities
(c)
Biomes
(d)
None

12 )

The energy which is utilised by the living world is primarily

(a)
heat.
(b)
electricity.
(c)
light.
(d)
kinetic.

13 )

Alexander van Humbolt described for the first time

(a)
ecological biodiversity
(b)
lawof limiting factor
(c)
species area relationships
(d)
population growth equation

14 )

Select the correct statement about bjodiversity.

(a)
The desert areas of Rajasthan and Gujarat , have a very high level of desert animal species as wellas numerous rare animals
(b)
Large scale planting of Bt cotton has no adverse effect on biodiversity
(c)
Western Ghats have a very high degree of species richness and endemism
(d)
Conservation of biodiversityis just a fad pursued by the developed countries

15 )

A high density of elephant population in an area can result in

(a)
mutualism
(b)
intraspecific competition
(c)
interspecific competition
(d)
predation on one another

16 )

A behavioural strategy of adaptation called echolocation is found in

(a)
bats
(b)
butterfly
(c)
praying mantis
(d)
arctic tern.

17 )

The given figure represents different factors affecting population density (N). If B = natality, D = mortality, E= emigration and I = immigration; then select the incorrect option regarding these.

(a)
B and D are most influential factors under normal conditions while I and E become important in special conditions
(b)
In a new habitat just being colonised, I becomes more important than B
(c)
B and I cause positive changes in N
(d)
I is generally equal to E

18 )

Genetic variations affect the production of the drug reserpine in the medicinal plant Rauwolfia vomitoria growing in different Himalayan ranges. What kind of diversity does it indicate?

(a)
Species diversity
(b)
Genetic diversity
(c)
Ecological diversity
(d)
None of these

19 )

An exotic species that is introduced to a new area, spreads rapidly and eliminates native species is called

(a)
immigrant species
(b)
invasive species
(c)
destructive species
(d)
none of these.

20 )

Biosphere reserves differ from national parks and wildlife sanctuaries because in the former

(a)
human beings are not allowed to enter
(b)
people are an integral part of the system
(c)
plants are paid greater attention than the animals
(d)
living organisms are brought from allover the world and preserved for posterity

21 )

What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?

(a)
All are in situ conservation methods
(b)
All are ex situ conservation methods.
(c)
All require ultra modern equipment and large space
(d)
All are methods of conservation of extinct organisms.

22 )

Assertion: The process of nitrification involves the decomposition of proteins of dead plants and animals, and nitrogenous wastes like urea, uric acid, etc. of animals to ammonia.
Reason: Nitrogen cycle is a sedimentary cycle.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion.
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion.
(c)
If assertion is true but reason is false.
(d)
If both assertion and reason are false.

23 )

In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice as :
Assertion: Biodiversity hotspots are the regions which possess high levels of species richness, high degree of endemism and no loss to habitats
Reason: Total number of biodiversity hotspots in the world is 32 with two of these hotspots found in India

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false

24 )

Amount of biomass or organic matter produced per unit area over a time period is represented or expressed in terms of