Tag: botany

Questions Related to botany

Parachute type of mechanism of seed dispersal is found in

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

  1. Pea/ Leguminosae

  2. Mustard/ Cruciferae

  3. Cotton/ Malvaceae

  4. Taraxacum/ Compositae

Show answer
Correct Option: D
Explanation:
  • Parachute mechanism of fruit and seed dispersal is due to a structure called pappus. 
  • Pappus is the Calyx. Pappus or fruit and seed dispersal mechanism is a modification process and this process is known as Calyx. Calyxes are the protective shield of the flower and they can protect the reproduction system of the flower. They help the flower to produce seeds. 
  • Parachute mechanism is characteristic of family Compositae.
  • Hence Parachute type of mechanism of seed dispersal is found in Taraxacum/ Compositae.
  • So, the correct answer is 'Taraxacum/ Compositae'.

An easily disturbed ecosystem which can recover after sometime after the stoppage of damaging factor, is of

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

  1. Low stability and high resilience

  2. High stability and high resilience

  3. Low stability and low resilience

  4. High stability and low resilience

Show answer
Correct Option: A
Explanation:

Answer is option A i.e. "Low stability and high resilience"
Stability is the power of a system to be in their state against unfavorable factor. Resilience is the capability of regaining its original shape or position after being deformed. An ecosystem which can be easily damaged but can recover after sometime when it 's damaging effect stops will be having low stability and high resilience. Hence, it has low stability and high resilience.

Dispersal of seed in Opium or poppy or argemone occurs by

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

  1. Explosive mechanism

  2. Parachute mechanism

  3. Censer mechanism

  4. aculatormechanism

Show answer
Correct Option: C

Heavy rainfall during summer produces

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

  1. Desert

  2. Grassland

  3. Forest

  4. Wetland

Show answer
Correct Option: B
Explanation:

During summer the land becomes dry and rainfall induces formation of grass and hence heavy rainfall during summer produces grasslands.

So, the correct answer is 'Grassland'

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'