Environmental Studies ยท Biology

Ecology and Biodiversity

1,737 Questions

Ecology and biodiversity are vital topics in environmental studies, covering ecosystem structures, species diversity, and environmental impacts. These concepts are frequently tested in competitive examinations for civil services and state selections. The questions cover carrying capacity, ecological succession, and conservation fundamentals.

Species richness measurementTypes of ecological diversityBiome distribution factorsCarrying capacity conceptEcosystem servicesEnvironmental Impact Assessment

Ecology and Biodiversity Questions

Multiple choice

Which of the following is an example of a source-sink metapopulation?

  1. A metapopulation of butterflies in a fragmented forest

  2. A metapopulation of fish in a river system

  3. A metapopulation of birds in an urban area

  4. A metapopulation of plants in a desert
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A metapopulation of birds in an urban area can be an example of a source-sink metapopulation, where some urban areas act as sources (with high-quality habitat and positive population growth) and others act as sinks (with low-quality habitat and negative population growth).

Multiple choice

Which concept emphasizes the interconnectedness of all living things and the need for a holistic approach to environmental stewardship?

  1. Anthropocentrism

  2. Biocentrism

  3. Ecocentrism

  4. Technocentrism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ecocentrism recognizes the intrinsic value of all living things and advocates for the protection of ecosystems as a whole.

Multiple choice

What is functional diversity?

  1. The variety of traits and functions that organisms have in an ecosystem

  2. The number of different species in an ecosystem

  3. The genetic diversity within a population

  4. The physical structure of an ecosystem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Functional diversity refers to the variety of traits and functions that organisms have in an ecosystem. This includes the different ways that organisms use resources, interact with each other, and contribute to ecosystem processes.

Multiple choice

Which of the following is not a component of functional diversity?

  1. Species richness

  2. Species evenness

  3. Functional redundancy

  4. Functional dispersion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Species richness is not a component of functional diversity. Functional diversity refers to the variety of traits and functions that organisms have in an ecosystem, while species richness refers to the number of different species in an ecosystem.

Multiple choice

What is migration?

  1. The movement of individuals from one population to another

  2. The movement of individuals from one habitat to another

  3. The movement of individuals from one ecosystem to another

  4. The movement of individuals from one biome to another
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Migration is the movement of individuals from one habitat to another, often in response to seasonal changes or in search of food or breeding grounds.

Multiple choice

What is the significance of energy flow in ecosystems?

  1. Maintains Ecosystem Balance

  2. Provides Energy for Life Processes

  3. Supports Biodiversity

  4. All of the Above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Energy flow is crucial for maintaining ecosystem balance, providing energy for life processes, and supporting biodiversity. It ensures that energy is transferred from producers to consumers and decomposers, sustaining the entire food web.

Multiple choice

What is the significance of energy flow in food webs?

  1. Maintains Ecosystem Stability

  2. Supports Biodiversity

  3. Provides Energy for Life Processes

  4. All of the Above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Energy flow in food webs is essential for maintaining ecosystem stability, supporting biodiversity, and providing energy for life processes. It ensures that energy is transferred from producers to consumers and decomposers, sustaining the entire ecosystem.

Multiple choice

Which of the following is NOT a supporting service provided by ecosystems?

  1. Pollination

  2. Water cycling

  3. Nutrient cycling

  4. Climate regulation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Climate regulation is a regulating service, not a supporting service.

Multiple choice

Which ecosystem service is responsible for the regulation of the Earth's temperature?

  1. Climate regulation

  2. Water cycling

  3. Nutrient cycling

  4. Pollination
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Climate regulation is the process by which the Earth's temperature is regulated through various mechanisms, such as the greenhouse effect.

Multiple choice

The process by which nutrients are cycled through the ecosystem, from the environment to organisms and back, is known as:

  1. Nutrient cycling

  2. Biogeochemical cycling

  3. Ecological cycling

  4. Nutrient exchange
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nutrient cycling is the process by which nutrients are cycled through the ecosystem, from the environment to organisms and back.

Multiple choice

What is the difference between a species and an ecosystem?

  1. A species is a group of organisms that can interbreed, while an ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.

  2. A species is a group of organisms that share a common ancestor, while an ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.

  3. A species is a group of organisms that live in the same area, while an ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.

  4. A species is a group of organisms that have similar characteristics, while an ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A species is a group of organisms that can interbreed, while an ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.

Multiple choice

What is the role of keystone species in an ecosystem?

  1. Keystone species are species that have a disproportionately large impact on their ecosystem relative to their abundance.

  2. Keystone species are species that are essential for the survival of other species in their ecosystem.

  3. Keystone species are species that are at the top of the food chain in their ecosystem.

  4. Keystone species are species that are found in all ecosystems.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Keystone species are species that have a disproportionately large impact on their ecosystem relative to their abundance. They play a critical role in maintaining the structure and function of their ecosystem.

Multiple choice

What is the concept of carrying capacity in ecology?

  1. Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely, given the food, water, and other resources available.

  2. Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely, given the amount of pollution that the species produces.

  3. Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely, given the amount of habitat that is available.

  4. Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely, given the number of predators that are present.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely, given the food, water, and other resources available.

Multiple choice

What is the role of decomposers in an ecosystem?

  1. Decomposers are organisms that break down dead organic matter into simpler substances that can be used by other organisms.

  2. Decomposers are organisms that convert organic matter into inorganic matter.

  3. Decomposers are organisms that recycle nutrients back into the environment.

  4. Decomposers are organisms that help to maintain the balance of oxygen and carbon dioxide in the atmosphere.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Decomposers are organisms that break down dead organic matter into simpler substances that can be used by other organisms.

Multiple choice

What is the term used to describe the dynamic equilibrium that exists in a healthy ecosystem?

  1. Ecological balance

  2. Homeostasis

  3. Carrying capacity

  4. Trophic cascade
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ecological balance refers to the state of equilibrium in which the populations of different species in an ecosystem are relatively stable and the ecosystem functions properly.