KERALA PSC / BIOLOGY / PLANT PROCESSES / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

 

KERALA PSC / BIOLOGY / PLANT PROCESSES / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

KERALA PSC / BIOLOGY / PLANT PROCESSES / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

·      Photosynthesis is the process by which green plants manufacture food in the form of carbohydrates by using water, CO₂ and sunlight. During Photosynthesis plants use carbon dioxide and give out Oxygen.

·      Oxygen balance in the atmosphere is maintained through the process of Photosynthesis.

·      The percentage of light energy fixed in photosynthesis is generally around 1%

·      Photosynthesis takes place faster in red light

·      Plant pigments do not absorb all the wavelengths of visible light. Out of the seven colours of light, only blue, red and some violet light are absorbed.

·      During day time plants take in carbon dioxide and gives out oxygen

·      Guttation: In some plants, water oozes through certain pores in the form of liquid, that pores remain permanently open and this phenomenon is called guttation

·      Osmosis: The process by which water diffuses through a semi-permeable membrane from a region of higher concentration of a solution to a region of lower concentration of a solution

·      Transpiration: The leaves excretes water through stomata by transpiration process.

·      For the process of respiration in plants oxygen is necessary.

·      Xylem is responsible for the conduction of water in plants

·      Plants get water through the roots because of capillarity

·      Phloem carries prepared food from leaves to all parts of plant.

KERALA PSC / BIOLOGY / PLANT PROCESSES / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY