Question

Q19.Which of the following breakdown the food materials outside its body and then absorb it? A. Amoeba B. Mushroom C. Man D. leech
Q20.Carbon dioxide is transported to the lungs for expiration through blood after getting dissolved in A. RBCs B. WBCs C. Platelets D. Plasma
Q21.Which process helps plants to absorb oxygen from the atmosphere during respiration? A. Filtration B. Reabsorption C. Osmosis D. Diffusion
Q22.Exchange of materials between the blood and surrounding cells takes place through A. arteries B. veins C. capillaries D. lymph vessels
Q23.Case study Transpiration in plants is the natural process of loss of extra water in the form vapour through stomata in leaves. Apart from it , it also carries out some other functions. Which of the following is not a function of transpiration? A. Absorption of water B. Upward movement of water and minerals C. Reabsorption of water​

Answer 1

Answer:

Part 1 - Mode of nutrition

Heterotrophic nutrition is the mode of nutrition in which organisms depend on other organisms for food to survive.

Organisms have various kinds of modes of nutrition which can be classified into: -

Holozoic nutrition - In this type of nutrition, organism intakes the food which is called ingestion and then the organism digests the food.

Parasitic nutrition - In this type of nutrition, one organism derives its food from another living organism.

Saprotrophic nutrition - This is a kind of nutrition where organisms depend on dead and decaying matter for their nutrition.

Part 2 - Saprotrophic nutrition

Saprophytic nutrition is the process of animals feeding on dead and decaying substances or organisms for getting energy, food and nutrition. Organisms that follow saprophytic nutrition are called saprotrophs. They are the recycler of nutrients.

They release specific enzymes that act on complex organic matter and break them into smaller and simpler particles that are easily consumable by the organism.

Part 3 - Examples

Major examples of saprotrophs include bacteria, fungi, and fungus-like organisms like slime mould, Penicillium, and Escherichia coli.

Part 4 - Conclusion

Organism like - Mushroom, Yeast, and Bread mould are saprophytic. They break down food outside the body and absorb the simpler digested particles.

Green plants are autotrophic in nature.

Paramecium, Amoeba are organisms having holozoic mode of nutrition.

Custca, Tapeworm, and Lice are parasitic organisms.

Final step - The fungi like Yeast, Mushroom, Bread mould are the organisms that are saprotrophic.