Advertisements
Advertisements
प्रश्न
Name the type of nutrition exhibited by Amoeba. Explain how food is taken in and digested by this organism.
उत्तर
The digestive system differs in various organisms. In single-celled organisms, the entire surface may take in food. But as the organism's complexity increases, different parts become specialised to perform other functions. Amoeba takes in food using temporary finger-like extensions of the cell surface, which fuse over the food particle, forming a food vacuole. In the food vacuum, complex substances are broken down into simpler ones and diffused into the cytoplasm. The remaining undigested material is moved to the cell's surface and thrown out. In Paramoecium, a unicellular organism, the cell has a definite shape, and food is taken in at a specific spot. Food is moved to this spot by the movement of cilia, which cover the entire cell surface.
APPEARS IN
संबंधित प्रश्न
Green plants are called ______ since they synthesise their own food.
The plant which traps and feeds on insects is ______.
What is the mode of nutrition in fungi?
Name one organism each having saprophytic, parasitic and holozoic modes of nutrition.
Why is nutrition necessary for an organism?
The process of obtaining food by Amoeba is known as:
(a) dialysis
(b) cytokinesis
(c) phagocytosis
(d) amoebiasis
The organism having parasitic mode of nutrition is:
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Parrot
Which of the following is an incorrect statement?
(a) energy is essential for life processes
(b) organisms grow with time
(c) movement of molecules does not take place among cells
(d) organisms must repair and maintain their body
There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food.
(a) Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?
(b) Which organism is an autotroph?
(c) Which organism is/are heterotroph(s)?
(d) Which organism can be a producer?
(e) Which organism is/are consumer (s)?
(f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) D
Can you give me a name?
Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.
I live in water; people keep me in an aquarium and feed me. ______, ______
