ASSERTION : Some marine animals find it difficult to live in fresh water and vice versa. REASON : Some animals can tolerate a narrow salinity range, while others can tolerate a wide salinity range.
Correct!
Wrong!
ASSERTION : Digestive system is ill developed in flatworms. REASON : Semi-digested or digested food in flatworms are absorbed through the body surface.
Correct!
Wrong!
ASSERTION : Presence of pneumatophores is a special adaptation of hydrophytes. REASON : Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange.
Correct!
Wrong!
ASSERTION : The lenticel is meant for gaseous exchange. REASON : Lenticel checks excessive evaporation of water.
Correct!
Wrong!
ASSERTION : Blood in cockroach is colourless haemolymph with no respiratory pigment. REASON : Respiration in cockroach occurs through diffusion in haemolymph.
Correct!
Wrong!
ASSERTION : Some proteins of the ER are formed by free ribosomes in the cytosol. REASON : Most of the proteins are synthesised by free ribosomes.
Correct!
Wrong!
ASSERTION : The higher the turn-over number the more efficient an enzyme is. REASON : Turn-over number is not dependent upon the number of active sites present over an enzyme.
Correct!
Wrong!
ASSERTION : In mitosis each replication cycle of DNA is followed by one cell division. REASON : In meiosis one replication cycle of DNA is followed by two divisions.
Correct!
Wrong!
ASSERTION : Root pressure develops in root hair cell. REASON : Root pressure is maximum in dry season.
Correct!
Wrong!
ASSERTION : Atmospheric nitrogen gas is always fixed by nitrogen-fixing microorganisms. REASON : Decomposers release nitrogen gas from dead bodies of plants and animals.
Correct!
Wrong!
Assertion and reason quiz - Bio
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