Tag: ecosystems

Questions Related to ecosystems

The ecosystem services include.

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Maintenance of biodiversity

  2. Pollination of crop

  3. Spiritual, cultural and aesthetic values

  4. All of these

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Correct Option: D
Explanation:

  • The ecosystem services include 
  • provisioning services such as food and water;
  • regulating services such as regulation of floods, drought, land degradation, and disease; 
  • supporting services such as soil formation and nutrient cycling;
  • and cultural services such as recreational, spiritual, religious and other non-material benefits.
So, the correct option is 'All of these'

Who confirmed communities with more species tend to be more stable than those with less species?

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Alexander von Humboldt

  2. David Tilman

  3. Paul Ehrlich

  4. Edward Wilson

Show answer
Correct Option: B
Explanation:

Ecologists believe that the communities with more species tend to be more stable than those with less species.

Keystone species deserve protection because these 

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. are capable of surviving in harsh environmental conditions

  2. indicate presence of certain minerals in the soil

  3. have become rare due to overexploitation

  4. play an important role in supporting other species.

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Correct Option: D
Explanation:

Keystone species are those species which have significant and disproportionately large influence on the community structure and characteristic. It has often considered low abundance and biomass as compared to dominant species.

When two similar species live in the same area, they may evolve to become more different in order to ________________.

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. drive the other species to extinction

  2. reduce competition

  3. use up the other species resources

  4. reduce genetic variation

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Correct Option: B
Explanation:

According to the mechanism of resource partitioning (supported by Mac Arthur), if two species compete for the same resource, they could avoid competition by choosing, for instance, different times for feeding or different foraging patterns. Two species evolve to become different too reduce competition, so that species can co-exist. 

What are the important factors that bring about biological diversity?

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Temperature

  2. Enviornment

  3. Climatic conditions

  4. All of the above

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Correct Option: D
Explanation:

The correct answer is 'all of the above'

Biological diversity occurs due to the differential adaptation of organisms to varying environmental factors such as differences in temperature and climate conditions. These various mechanisms applied for adapting create the vast biological diversity we see around the world. 
So the correct option is D.

Decomposers converts

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Organic material into inorganic material

  2. Organic matter into carbon dioxide and nutrients

  3. Kill the soil microbes

  4. All

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Correct Option: B
Explanation:

Detritus is defined as dead and decaying organic matter that includes fallen leaves, dead plant parts and animals. It is the primary source of energy in the detritus food chain in which the microbes such as protozoans, bacteria and fungi help in the breaking down of the complex organic matter. They are called decomposers. Detritus food chain hence helps in soil replenishment by adding nutrients to the soil. They convert organic matter into carbon dioxide and nutrients. Thus the correct answer is option B.

The product of ecosystem processes which have environmental, asthetic and indirect economic value is called as

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Ecosystem services

  2. Biosphere services

  3. Environmental services

  4. None of the above

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Correct Option: A

In an ecosystem which of the following are important components?

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Energy flow and food chain

  2. Mineral recycling and energy flow

  3. Food chain and decomposers

  4. All of the above

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Correct Option: D
Explanation:

Any ecosystem has two components -biotic or living organisms and abiotic or non-living component. 

Further, two most important functional characteristics of any ecosystem are unidirectional flow of energy and cycling of material. The living organisms of an ecosystem are related through food chains, which gives rise to trophic levels in an ecosystem. Energy is transferred from one trophic level to the next through the food chains. 
Of all the organisms in an ecosystem, the most important role is played by decomposers. The nutrients are released back into the environment by the decomposition of dead organisms. Thus, the correct answer is option D.

Valuable, practical services that help to preserve ecosystem performed by nature are called

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Ecosystem service

  2. Biological control

  3. The green house effect

  4. Biosphere balancing

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Correct Option: A

Which one of the following is the most stable ecosystem?

botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

  1. Forest

  2. Mountain

  3. Desert

  4. Ocean

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Correct Option: D