NEET · Biology —

Biodiversity and Conservation appeared 5 times across 1 year — 5.6% of Biology. This question is from Causes of Biodiversity Loss.

Year 2024 Total
Questions 5 5
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Which of the following statements are correct? A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss. B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans. C. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake. D. Water hyacinth is an invasive species. E. When a species becomes extinct, the plant and animal species associated with it are not affected. Choose the correct answer from the options given below:

Solution & Explanation

Related Formula

Biodiversity Loss Factors: Habitat Loss, Over-exploitation, Alien Invasive Species, Co-extinction.

Core Logic
  • Statement A: Amazon rainforest clearing for soyabeans is habitat loss (True).
  • Statement B: Steller's sea cow & passenger pigeon went extinct due to over-exploitation (True).
  • Statement C: Nile perch caused extinction of 200+ cichlid fish species in Lake Victoria (False).
  • Statement D: Water hyacinth (Eichhornia) is an invasive weed species (True).
  • Statement E: Co-extinction means obligatorily associated species also become extinct (False).
Step 1: Selection

Correct statements are A, B, and D only. This corresponds to option (2).

Pattern Recognition

Statement C claims Nile perch 'helped' cichlids (False, it wiped them out). Statement E claims associated species 'are not affected' (False, co-extinction occurs). Eliminating C and E leaves A, B, D.

Chapter Mix

Class 12 Biology: Biodiversity and Conservation

Reference Study Guides

Biodiversity And Conservation

More Biodiversity and Conservation Previous-Year Questions

Q91 neet_2024_05_may_morning Loss of Biodiversity
"The Evil Quartet" of biodiversity loss includes which of the following?
  • A. Over-exploitation; Alien species invasions; Air pollution; Co-extinctions
  • B. Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions
  • C. Habitat loss and fragmentation; Air pollution; Water pollution; Co-extinctions
  • D. Over-exploitation; Alien species invasions; Soil pollution; Co-extinctions

Solution

Related Formula

The Evil Quartet = Habitat loss and fragmentation + Over-exploitation + Alien species invasions + Co-extinctions.

Core Logic

'The Evil Quartet' is the sobriquet used to describe the four major causes of biodiversity loss:

  • Habitat loss and fragmentation
  • Over-exploitation
  • Alien species invasions
  • Co-extinctions
Step 1: Evaluation

Comparing the four causes with option (2): Option (2) lists: Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions.

Pattern Recognition

Sees: 'Evil Quartet' → Immediately recall the four classic drivers of biodiversity loss (Habitat loss, Over-exploitation, Alien species, Co-extinction).

Chapter Mix

Class 12 Biology: Biodiversity and Conservation

Q117 neet_2024_05_may_morning Bioprospecting Definition
Exploring molecular, genetic and species-level diversity for products of economic importance is called
  • A. Biomagnification
  • B. Biofortification
  • C. Bioremediation
  • D. Bioprospecting

Solution

Related Formula

Bioprospecting = Exploration of biological diversity for commercially valuable genetic and biochemical products.

Core Logic

Exploring molecular, genetic, and species-level diversity for economic products (medicines, industrial chemicals, crops) is explicitly defined as bioprospecting.

Step 1: Selection

The correct term is Bioprospecting. Option (4) is correct.

Pattern Recognition

Exploring diversity for economic products = Bioprospecting.

Chapter Mix

Class 12 Biology: Biodiversity and Conservation

Q124 neet_2024_05_may_morning In-situ Conservation Strategies
Which of the following is an in situ conservation method?
  • A. Sacred Groves
  • B. Wildlife Safari Parks
  • C. Botanical Gardens
  • D. Seed Banks

Solution

Related Formula

In-situ (On-site): Biosphere reserves, National Parks, Wildlife Sanctuaries, Sacred Groves. Ex-situ (Off-site): Botanical Gardens, Zoological Parks, Wildlife Safari Parks, Seed/Gene Banks.

Core Logic

Sacred Groves protect biodiversity within its natural habitat (In-situ conservation). Wildlife Safari Parks, Botanical Gardens, and Seed Banks involve protecting species outside their natural habitat (Ex-situ conservation).

Step 1: Conclusion

Sacred Groves is an in situ conservation method. Option (1) is correct.

Pattern Recognition

Sacred Groves = In-situ. Botanical Gardens / Seed Banks / Safari Parks = Ex-situ.

Chapter Mix

Class 12 Biology: Biodiversity and Conservation

Q129 neet_2024_05_may_morning Mass Extinction Episodes
Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes?
  • A. The current species extinction rates are far lower than those in previous episodes.
  • B. The present species extinction rates are 100 to 1000 times faster than in the pre-human times.
  • C. The present net species extinction rate is zero.
  • D. The current species extinction rate is nearly 10 times faster than in previous episodes.

Solution

Related Formula

Sixth Extinction Rate = 100 to 1000 times faster than pre-human background extinction rates due to anthropogenic activities.

Core Logic

The ongoing sixth mass extinction is driven primarily by human activities, and the extinction rate is estimated to be 100 to 1000 times faster than pre-human times.

Step 1: Selection

Option (2) correctly states that present rates are 100 to 1000 times faster.

Pattern Recognition

Sixth mass extinction speed = 100 to 1000 times faster than pre-human times.

Chapter Mix

Class 12 Biology: Biodiversity and Conservation

More Biodiversity and Conservation Questions — neet_2024_05_may_morning

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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)