Tag: ecosystems

Questions Related to ecosystems

Plants take nitrogen from the soil by absorption through their roots as

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

  1. Nitrate ions

  2. Nitrite ions

  3. Ammonium ions

  4. All of the above

Show answer
Correct Option: A,C
Explanation:

Plants take nitrogen from the soil by absorption through their roots as nitrate ions and ammonium ions.Nitrite is intermediate and gets converted to either forms by symbiotic or non-symbiotic bacteria present in plant roots and soil respectively.  Most nitrogen obtained by terrestrial animals can be traced back to the eating of plants at some stage of the food chain.

So, the correct answer is 'nitrate ions' and 'ammonium ions'

Plants of which one of the following groups of genera are pollinated by the same agency?

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

  1. Triticum, Cocos, Mangifera

  2. Ficus, Kigelia, Casuarina

  3. Salvia, Morus, Euphorbia

  4. Bombax Butea, Bauhinia

Show answer
Correct Option: C
Explanation:

Salvia, Morus, Euphorbia are pollinated by insects (entomophily)

So the correct answer is 'Salvia, Morus, Euphorbia'

Carbonisation is 

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

  1. Slow conversion of dead vegetation Into coal

  2. Deposition of soil

  3. Falling of trees

  4. None of these

Show answer
Correct Option: A
Explanation:

Carbonization (or carbonisation) is the term for the conversion of an organic substance into carbon or a  carbon containing residue through destructive distillation or pyrolysis (also occurs in nature). It is often used in organic chemistry with  reference to the generation of coal gas and coal tar from raw coal.

So, the correct answer is 'slow conversion of dead vegetation into coal'

Which of the following method is applicable for pollination in gymnosperms?

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

  1. Anemophilous

  2. Entemophilous

  3. Hydrophilous

  4. None of the above

Show answer
Correct Option: A
Explanation:

Phanerogamae are the sub-kingdom of kingdom Plantae. They include seed bearing and flowering plants. They are further grouped into angiosperms and gymnosperms. Gymnospermic plants are pollinated by wind that is anemophilous.

So, the correct answer is 'Anemoplilous'

Which of the following is the natural method of hybridisation?

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

  1. Interspecific hybridisation

  2. Cross pollination

  3. Somatic cell hybridisation

  4. All of the above


Show answer
Correct Option: B
Explanation:

Cross pollination is the transfer of pollen from the anthers of a flower of one plant to the stigma of a flower of another  plant. It is a natural process.

So, the correct answer is 'cross pollination'

Select the wrong statement. 

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

  1. Forest provide variety of products.

  2. Forest have great plant diversity.

  3. Forest does not conserve soil.

  4. Forest conserves water.

Show answer
Correct Option: C
Explanation:

It is wrong that the forest do not conserve soil. Actually forest prevent soil erosion by covering the soil by the canopy of the plants and reduces the impact of rain water and wind on the top layer of soil. The roots hold the soil and also prevent soil erosion.

So, the correct answer is 'Forest does not conserve soil'

The productive area required to produce all the resources for humanity to consume and to absorb all its waste is known as 

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

  1. A habitat 

  2. An ecosystem 

  3. An ecological footprint 

  4. The biosphere

  5. The carrying capacity

Show answer
Correct Option: C
Explanation:
A. A habitat is a place where an organism lives and represents a particular set of environmental conditions suitable for its successful growth.
B. An ecosystem is a whole biotic community in a given area including its abiotic environment.
C. An ecological footprint is the measurement of any productive area (land or water) that is used by the human beings to produce the resources consumed by them and absorb the waste generated.
D. The planet Earth along with its atmosphere that sustains life is called biosphere.
E. Carrying capacity is the maximum size of the population that an environment can sustain.
So, the correct answer is 'An ecological footprint'.

Which of the following describes the ecosystem services?

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

  1. Carbon fixation

  2. Pollination

  3. Perennial water

  4. All of the above

Show answer
Correct Option: D

A functional aspect of an ecosystem is

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

  1. Producers, consumers and abiotic environment

  2. Regulation of populations

  3. Light, temperature, oxygen and carbon dioxide

  4. Both A and C

Show answer
Correct Option: B
Explanation:

The functional aspects of an ecosystem include the regulation of populations, flow of energy, biogeochemical cycles, and the flow of nutrients. It also includes ecological succession, food chain, ecological pyramid, food web. Populations are regulated in an ecosystem through these food chains.

Thus, the correct answer is 'Regulation of populations.'

An ecosystem does not normally alter because it is in a state of

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

  1. Homeostasis

  2. Imbalance

  3. Deficient light

  4. Deficient components

Show answer
Correct Option: A
Explanation:

Ecosystem is made up of living and nonliving things. Living things include plants and animals. Nonliving things includes air, water, land.  It is composed of organisms interacting within communities. The importance of ecosystem lies in both cycling of minerals and flow of energy. It does not alter normally because it is in a state of homeostasis. There is always balance of organisms in an ecosystem within themselves and with changing environment.

Thus, the correct answer is 'Homeostasis.'