Biology, asked by simran352, 1 year ago

please tell answers of these questions

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Answered by ShivPriya
2
heya !!!

■NUTRITION IN AMOEBA

☆Amoeba is a unicellular , omnivore organism that does not possess specialised organs for the process of nutrition.

☆Mode of nutrition in Amoeba is HOLOZOIC NUTRITION and takes place with the help of finger like extensions called pseudopodia .

☆It engulfs food when it comes in contact with its cell surface by ingestion . Pseudopodia fuses over food particle to form vacuole.

☆Digestion in Ameoba is INTRACELLULAR in nature . Inside the food vacuole. Complex food breaks onto small soluble molecules , readily absorbed by the cytoplasm. This process is ABSORPTION.

☆The absorbed food is further ASSIMILATED by Amoeba to derive energy for growth.

☆The undigested food material is removed by the cell membrane, which ruptures suddenly at any place and eliminates out the undigested food . This process of throwing out undigested food is called EGESTION .

■WHAT HAPPENS TO FOOD IN SMALL INTESTINE

⊙Small intestine is the site of COMPLETE DIGESTION OF FOOD INTO DIFFERENT COMPONENTS .

⊙ Secretions from liver and pancreas enter the intestine to help in the digestion process .

⊙The inner lining of the small intestine has numerous finger like projections called VILLI , which increase the surface area for absorption.

■CONDITION NECESSARY FOR PHOTOSYNTHESIS

Presence of SUNLIGHT and CHLOROPHYLL are necessary for photosynthesis .

1. SUNLIGHT affects the rate of photosynthesis by its varying intensity , quality and duration .

2. CHLOROPHYLL it's a green coloured pigment photosynthetic pigment found in chloroplasts of a plant that is responsible for trapping sunlight solar energy.

6 CO2 (CARBONDIOXIDE) + 12 H2O (WATER) ------> C6 H12 06 ( GLUCOSE) + 6 H20 (WATER) + 6 O2 (OXYGEN)

■EXCHANGE OF GASES IN PLANTS

》Plants obtain gases they need through their leaves.

》They require O2 for respiration and CO2 for photosynthesis.

》STOMATA these are tiny pores , mostly found in the lower epidermis , which allow exchange of gases to enter and exit the leaf more rapidly between plant and atmosphere .

hope it helps u dear ^_^




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ShivPriya: pls mark it as brainliest.....!!
Hemamalini15: Nyc answer dear
ShivPriya: thanks ^_^
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ShivPriya: pls mark it as brainliest
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