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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Write a Short Note On Importance of Light to Plants - Biology

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प्रश्न

Write a short note on Importance of light to plants

उत्तर

Importance of light to plants

Sunlight acts as the ultimate source of energy for plants. Plants are autotrophic organisms, which need light for carrying out the process of photosynthesis. Light also plays an important role in generating photoperiodic responses occurring in plants. Plants respond to changes in intensity of light during various seasons to meet their photoperiodic requirements for flowering. Light also plays an important role in aquatic habitats for vertical distribution of plants in the sea.

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Organism and Its Environment - Major Abiotic Factors
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Organisms and Populations - Exercises [पृष्ठ २४०]

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एनसीईआरटी Biology [English] Class 12
पाठ 13 Organisms and Populations
Exercises | Q 11.4 | पृष्ठ २४०

संबंधित प्रश्‍न

Osmotic concentration of cell sap used to be maximum in ______.


Process by which water enters in the roots due to diffusion, is termed as:


Aquatic photo diffraction produces cones ______.


Which of the following is correct range of latitudes for temperate vegion?


According to Allen’s Rule, the mammals from colder climates have ______.


Formation of tropical forests needs mean annual temperature and mean annual precipitation as ______.


Species that can tolerate narrow range of temperature are called ______.


What are Eurythermic species?


Species that can tolerate wide range of salinity are called ______.


If a fresh water fish is placed in an aquarium containing sea water, will the fish be able to survive? Explain giving reasons.


Define heliophytes and sciophytes. Name a plant from your locality that is either heliophyte or sciophyte.


In a sea shore, the benthic animals live in sandy, muddy and rocky substrata and accordingly developed the following adaptations.

Building cubes

Find the suitable substratum against adaptation.


In a sea shore, the benthic animals live in sandy, muddy and rocky substrata and accordingly developed the following adaptations.

Holdfasts/peduncle

Find the suitable substratum against adaptation.


Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reasons for your answers.

Salvinia


Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reasons for your answers.

Mangifera


What is a tree line?


The graphs (X) and (Y) given below depict the diurnal variations in the solar radiations in the month of (Summer) and in December (Winters):

  1. Which of the two graphs depicts tropical regions and temperate regions respectively?
  2. Which of the two regions (X) or (Y) will show high biological diversity and why?

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