A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air - tubes S in its body.
What are organisms A, B and C?
Name P, Q, R and S.
Which organism/ organisms undergo aerobic respiration?
Which organism/ organisms undergo anaerobic respiration?
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Organism A is yeast.
AmoebaOrganism B is .
C is mosquito.Organism.
P is alcohol.
breathes through the cell membrane.Amoeba Q is the cell membrane because
R is spiracle.
S is tracheae.
Organisms B and C undergo aerobic respiration.
Organism A, i.e. yeast, undergoes anaerobic respiration.
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When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache.
What are (i) organisms A, and (ii) substance B?
What are (i) part C, and (ii) part D, of tooth known as?
By what name are the holes E in the tooth known?
Name the part F of the tooth.
What will happen if organisms A reach part F of the tooth known?