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NEET

Explore popular questions from Ecology and Environment for NEET. This collection covers Ecology and Environment previous year NEET questions hand picked by experienced teachers.

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Chemistry

Physics

Biology

Ecology and Environment

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Q 1. Sounds above what level are considered hazardous noise pollution{tex}?{/tex}

Above {tex}80{/tex} dB

B

Above {tex}30{/tex}{tex}\ \mathrm { dB } {/tex}

C

Above {tex}150{/tex} {tex} \mathrm { dB } {/tex}

D

Above {tex}120{/tex} {tex} \mathrm { dB } {/tex}

Explanation


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Q 2. Which of the following statements regarding biodiversity hot spots are incorrect?
(i) High endemism
(ii) High levels of species richness.
(iii) Total number is 34 in the world.
(iv) Five of these occur in India.
(v) High alien species invasions.
(vi) Cover less than 2% of the earth’s land area; but if properly conserved, they can reduce extinctions by about 30%.

A

(i), (ii), (iii)

(iv) and (v)

C

(iv), (v), (vi)

D

(i), (ii), (iv)

Explanation

Exotic species tend to cause a the reat to biodivesity. They are not found in hot spots which are regions of high biodiversity. In India, 3 hotspots ae found, i.e., Western Ghats and Sri Lanka, Indo-Burma (NE India) and Himalays.

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Q 3. __________ National Park was the first National Park of India.

Jim Corbett

B

Nanda Devi

C

Kaziranga

D

Jaldapara

Explanation

Jim Corbett National Park (district Nainita Uttrakhand ) is the first national park of India, established in 1936.

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Q 4. Antilopa carvicapra/Black Buck is -

A

Vulnerable

B

Endangered

Critically endangered

D

Extinct in the wild

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Q 5. Those species whose populations have been seriously depleted and whose ultimate security is not assured are known as -

A

Threatened species

Endangered species

C

Vulnerable species

D

Rare species

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Q 6. Which ecological factors are most strong determinants of various biomes?

Temperature and precipitation

B

Soil and wind

C

pH and humidity

D

Light and wind

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Q 7. In India highest amount of coal is present in

A

West Bengal

B

Maharastra

Jharkhand

D

Assam

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Q 8. Soil conservation is

A

Conversion of sterile soil into fertile one

B

Aeration of soil

C

Erosion of soil

Protection against loss

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Q 9. Genetic diversity in agricultural crops in threatened by

Introduction of high yielding varieties

B

Intensive use of fertilizers

C

Extensive intercropping

D

Intensive use of biopesticides

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Q 10. 25 hot spots of the world occupy an area of

A

0.20%

B

0.40%

C

0.80%

1.40%

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Q 11. Cultivated Rice has been protected from four diseases after receiving genes form

A

Oryza nivara

B

O. barthii

C

O. minuta

O. glaberrima

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Q 12. Species diversity ______ as we move away from the _____ towards _______.

A

Increases , Equator, poles

Decreases, Equator, poles

C

Decreases, Poles , Equator

D

None of these

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Q 13. What is the approximate percentage of the earth covered by terrestrial hot spots?

A

1.5% (less than 2%)

2.30%

C

3.50%

D

4.50%

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Q 14. Why are conservations calling for immediate, and often expensive, action on behalf of endangered species and habiats?

Biodiversity is beneficial to humans

B

Man has brought on climate change

C

Extinction is an unnatural process

D

It would be more costly, financially, if we did not act

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Q 15. The theory is island biogeography was first formally proposed by

A

Simberloff

MacArthur and Wilson

C

Whitehead and Jones

D

Brown and Kodric-Brown

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Q 16. Historically, island species have tended to become extinct faster than species living on a mainland living on a mainland. Which of the folloiwng reasons can not be used to explain this phenomenon?

A

Island species have often evolved in the absence of predators and have no natural avoidance strategies

B

Humans have introduced diseases and competitors to islands, which negatively impacts island populations

C

Island populations are-usually smaller than mainland populations

Island populations are usually less fit than mainland populations

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Q 17. Which of the following statements describe natural extinction?
A. Extinctions abetted by human activities
B. Slow replacement of existing species.
C. Also known abetted by human activities.
D. A small population is most likely to be extinct.

A

A, B

B

A, B, C

B, C, D

D

A, B, C, D

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Q 18. Which is / are correct about Amazon rain forest?
A. It is called Lungs of the planet.
B. It is being cut and cleared for cultivating soya beans or for conversion to grasslands for raising beef cattle.
C. The largely trophical rain forest in South America has highest biodiversity on earth
D. It harbours probably million of species

A

A, B

B

A, B, C

C

B, C, D

A, B, C, D

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Q 19. A species that is found only in particular region is said to be

A

Non indicator species for that region

B

A restricted species

C

A vulnerable species

A vulnerable species

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Q 20. Anthropogenic extinction is called

A

Fifth mass extinction

B

Fourth mass extinction

Sixth mass extinction

D

Seventh mass extinction

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Q 21. How many percent of the earth's land area is covered by all the biodiversity hotspots

More than two percent

B

Less than two percent

C

More than five percent

D

Less than ten percent

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Q 22. Which of the following does not belong to The Evil Quartet with reference to loss of biodiversity

A

Habitat loss and fragmentation

B

Over exploitation

Natural calamities

D

Alien species unvasions

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Q 23. The world summit on sustainable development held in 2002 in Johannesburg, South Africa, how many countries pledged their commitment to achieve by 2010

A

180

190

C

200

D

210

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Q 24.

Column I Column II
I. Western Ghats (a) Sacred lake
II. Donkey (b) Secondary home India
III. Khecheopalri Lake of Sikkim (c) Hot spot
IV. Rhinoceros (d) Kaziranga
Match the pairs of coloum I to coloum II

A

I - B, II - A, III - D, IV - C

B

I - D, II - A, III - B, IV - C

C

I - A, II - C, III - B, IV - D

I - C, II - B, III - A, IV - D

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Q 25. In ecosystem lithosphere is concerned with

A

Gases

Minerals

C

Water

D

All the above