Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

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

Parachute type of mechanism of seed dispersal is found in

  1. Pea/ Leguminosae

  2. Mustard/ Cruciferae

  3. Cotton/ Malvaceae

  4. Taraxacum/ Compositae
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

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

  1. Low stability and high resilience

  2. High stability and high resilience

  3. Low stability and low resilience

  4. High stability and low resilience
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Dispersal of seed in Opium or poppy or argemone occurs by

  1. Explosive mechanism

  2. Parachute mechanism

  3. Censer mechanism

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

Opium (Papaver somniferum) or argemone seeds are dispersed by the censer mechanism. The capsule has pores near the top through which seeds are shaken out when the plant sways in wind. The censer mechanism is named after its resemblance to a religious incense burner. Explosive mechanism is seen in balsam, parachute mechanism in composites, and cactus mechanism in cacti.

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

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

  1. Nitrate ions

  2. Nitrite ions

  3. Ammonium ions

  4. All of the above
Reveal answer Fill a bubble to check yourself
A,C Correct answer
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'

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

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

  1. Triticum, Cocos, Mangifera

  2. Ficus, Kigelia, Casuarina

  3. Salvia, Morus, Euphorbia

  4. Bombax Butea, Bauhinia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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

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

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

Carbonisation is 

  1. Slow conversion of dead vegetation Into coal

  2. Deposition of soil

  3. Falling of trees

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

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

  1. Anemophilous

  2. Entemophilous

  3. Hydrophilous

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

Which of the following is the natural method of hybridisation?

  1. Interspecific hybridisation

  2. Cross pollination

  3. Somatic cell hybridisation

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'

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

Select the wrong statement. 

  1. Forest provide variety of products.

  2. Forest have great plant diversity.

  3. Forest does not conserve soil.

  4. Forest conserves water.
Reveal answer Fill a bubble to check yourself
C Correct answer
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'