Ecosystems, Biodiversity & Conservation

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Ecosystems, Biodiversity & Conservation MCQ & Objective Questions

Ecosystems, Biodiversity & Conservation are crucial topics in environmental science that play a significant role in various school and competitive exams. Understanding these concepts not only helps in grasping the intricacies of our natural world but also enhances your exam preparation. Practicing MCQs and objective questions on these subjects can significantly improve your scores by reinforcing key concepts and helping you identify important questions.

What You Will Practise Here

  • Definitions and key concepts related to ecosystems and biodiversity.
  • Types of ecosystems and their characteristics.
  • The importance of biodiversity and its role in ecosystem stability.
  • Conservation strategies and their significance in protecting ecosystems.
  • Human impact on ecosystems and biodiversity loss.
  • Diagrammatic representations of food chains and food webs.
  • Important formulas related to ecological calculations.

Exam Relevance

The topics of Ecosystems, Biodiversity & Conservation are frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that assess their understanding of ecological principles, conservation methods, and the interdependence of species within ecosystems. Common question patterns include multiple-choice questions that require students to apply their knowledge to real-world scenarios, making it essential to be well-prepared with practice questions.

Common Mistakes Students Make

  • Confusing the terms "ecosystem" and "habitat".
  • Overlooking the significance of keystone species in maintaining ecosystem balance.
  • Misunderstanding the concept of biodiversity hotspots.
  • Neglecting the impact of invasive species on local ecosystems.

FAQs

Question: What are the main types of ecosystems?
Answer: The main types of ecosystems include terrestrial ecosystems (like forests and grasslands) and aquatic ecosystems (like freshwater and marine).

Question: Why is biodiversity important for ecosystems?
Answer: Biodiversity is crucial as it enhances ecosystem productivity, resilience, and stability, ensuring that ecosystems can withstand environmental changes.

Now is the time to boost your understanding and confidence! Dive into our practice MCQs on Ecosystems, Biodiversity & Conservation and test your knowledge to excel in your exams.

Q. If a conservation program costs $200,000 to protect 500 acres of land, what is the cost per acre?
  • A. $200
  • B. $300
  • C. $400
  • D. $500
Q. If a coral reef can support 50 species of fish per square kilometer, how many species can be supported in a reef that is 5 square kilometers?
  • A. 200
  • B. 250
  • C. 300
  • D. 350
Q. If a coral reef ecosystem can support 150 species of fish and 20% of these species are endangered, how many species are endangered?
  • A. 20
  • B. 25
  • C. 30
  • D. 35
Q. If a coral reef ecosystem covers 1500 square kilometers and 20% of it is damaged, how many square kilometers are still healthy?
  • A. 1200 km²
  • B. 1300 km²
  • C. 1400 km²
  • D. 1500 km²
Q. If a coral reef ecosystem has a growth rate of 2% per year and currently has 500 corals, how many corals will there be after 2 years?
  • A. 520
  • B. 525
  • C. 540
  • D. 550
Q. If a coral reef ecosystem loses 10% of its coral cover each year due to bleaching, how much coral cover remains after 3 years if it starts with 100%?
  • A. 70%
  • B. 72.9%
  • C. 73%
  • D. 75%
Q. If a forest ecosystem has 200 trees and 50% of them are oak trees, how many oak trees are there?
  • A. 100
  • B. 80
  • C. 50
  • D. 200
Q. If a forest ecosystem has 200 trees and each tree produces 50 kg of oxygen per year, how much oxygen does the forest produce annually?
  • A. 5000 kg
  • B. 10000 kg
  • C. 15000 kg
  • D. 20000 kg
Q. If a forest ecosystem has 200 trees and each tree produces 50 kg of oxygen per year, how much oxygen does the entire forest produce annually?
  • A. 5000 kg
  • B. 10000 kg
  • C. 15000 kg
  • D. 20000 kg
Q. If a habitat loses 10% of its area each year due to deforestation, how much area will remain after 3 years if it started with 200 hectares?
  • A. 162 hectares
  • B. 170 hectares
  • C. 180 hectares
  • D. 190 hectares
Q. If a habitat loses 10% of its biodiversity each year due to pollution, how much biodiversity remains after 3 years if it starts with 100 species?
  • A. 70.4
  • B. 72.9
  • C. 73.5
  • D. 75.0
Q. If a habitat loses 25% of its biodiversity, and originally had 120 species, how many species remain?
  • A. 80
  • B. 85
  • C. 90
  • D. 95
Q. If a lake has 200 species of fish and 15% are invasive species, how many invasive species are there?
  • A. 25
  • B. 30
  • C. 35
  • D. 40
Q. If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herbivorous fish are there?
  • A. 150
  • B. 200
  • C. 100
  • D. 250
Q. If a national park covers an area of 1500 square kilometers and 25% of it is designated for conservation, what area is designated for conservation?
  • A. 300
  • B. 400
  • C. 500
  • D. 600
Q. If a plant species can grow in 5 different types of soil, and each type of soil can support 4 different plant species, how many total plant species can be supported?
  • A. 5
  • B. 10
  • C. 20
  • D. 25
Q. If a wetland ecosystem can filter 200 liters of water per hour, how many liters can it filter in a day?
  • A. 2400 liters
  • B. 4800 liters
  • C. 5000 liters
  • D. 6000 liters
Q. If a wildlife reserve has 250 animals and the population increases by 10% each year, how many animals will there be after 2 years?
  • A. 275
  • B. 300
  • C. 305
  • D. 315
Q. In a biodiversity study, 15 different species of plants were found in a 1000 m² area. What is the average area occupied by each species?
  • A. 50 m²
  • B. 60 m²
  • C. 70 m²
  • D. 80 m²
Q. In a biodiversity study, 15 different species were found in a 1000 m² area. What is the average number of species per 100 m²?
  • A. 1.5
  • B. 3
  • C. 15
  • D. 0.15
Q. In a biodiversity study, 15 different species were found in a 1000 square meter area. What is the average number of species per 100 square meters?
  • A. 1.5
  • B. 2
  • C. 3
  • D. 4
Q. In a biodiversity study, researchers found that 15% of the 1200 species observed were new to science. How many new species were discovered?
  • A. 150
  • B. 180
  • C. 120
  • D. 200
Q. In a conservation program, 60% of the 500 animals are released back into the wild. How many animals are released?
  • A. 300
  • B. 250
  • C. 200
  • D. 350
Q. In a conservation project, 40% of the budget is allocated to habitat restoration. If the total budget is $200,000, how much is allocated for habitat restoration?
  • A. $60,000
  • B. $70,000
  • C. $80,000
  • D. $90,000
Q. In a food chain, which organism is typically at the top?
  • A. Producer
  • B. Primary Consumer
  • C. Secondary Consumer
  • D. Tertiary Consumer
Q. In a study, it was found that 25% of a certain habitat is covered by water. If the total area of the habitat is 800 acres, how many acres are covered by water?
  • A. 100 acres
  • B. 150 acres
  • C. 200 acres
  • D. 250 acres
Q. In a study, it was found that 25% of a coral reef has been damaged. If the total area of the reef is 2000 m², how much area is damaged?
  • A. 400 m²
  • B. 500 m²
  • C. 600 m²
  • D. 700 m²
Q. In a study, it was found that 25% of a population of 800 animals are herbivores. How many herbivores are there?
  • A. 150
  • B. 200
  • C. 250
  • D. 300
Q. What is biodiversity hotspot? (2019)
  • A. An area with high species richness
  • B. An area with low species richness
  • C. An area with only endemic species
  • D. An area with no human impact
Q. What is the main cause of biodiversity loss?
  • A. Climate Change
  • B. Pollution
  • C. Habitat Destruction
  • D. Overfishing
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