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| 166)Secondary growth in plants refersto the | |||
| growth in length and development of new branches after the plants starts flowering | formation of secondary tissues by the activity of lateral meristems | ||
| development of secondary organs after the plant attains maturity | development of flowers and fruits | ||
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| 167)Hydrophonics is concerned with | |||
| growing plants without water but with atmospheric moisture | the treatment of water with sound | ||
| the conservation of water technique | growing plant without soil | ||
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| 168)Which of the following hormones controls fruit ripening? | |||
| ethylene | ausins | ||
| zeatin | gibberellic acid | ||
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| 169)Seed dormancy can be broken by treating the seed with | |||
| acetic acid | coumarin | ||
| gibberellic acid | abscisic acid | ||
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| 170)An observer claimed in the late 17th century that he can see inside the human spermatozoon a miniature figure of man- a "humunculua" - which would grow into a full sized man in due course of time. This was reffred to as the theory of | |||
| preformation | heredity | ||
| pangenesis | epigenesis | ||
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| 171)The sex of a child is determined by the | |||
| chromosomes of the father | Rh facttor of the parents | ||
| blood group of the father | chromosomes of the mother | ||
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| 172)The cell undergoing a reduction division is called | |||
| meiospore | germ cell | ||
| oocyte | meiocyte | ||
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| 173)In which of the following is sex determined by environment? | |||
| maize | papaya | ||
| honeybee | bonnelia | ||
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| 174)Hemophilia a human disease is caused by | |||
| fungal infection | bacterial infection | ||
| viral infection | mutant gene | ||
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| 175)The disease sickle-cell anaemia is caused by | |||
| malarial infection | poor hygiene | ||
| iron deficiency | none of these | ||
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| 176)A child was found to be perfectly normal at birth. A few years later however his parents noticed that his activities were sluggish. He was therefore taken to a doctor and diagnosed to be mentally retarded. What do you think he was suffering from? | |||
| epilepsy | parkinson's disease | ||
| phenylketonuria | alcaptonuria | ||
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| 177)The fungus, puccinia graminis causes a serious plant disease. Which of the following crops is affected by it? | |||
| rice | wheat | ||
| maize | gram | ||
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| 178)Lathyrism a human disease causing paralysis of the lower limbs is caused by | |||
| nervous failure | viral infection | ||
| consumption of kesari dal | bacterial infection | ||
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| 179)Quinine the commonly used drug for malaria is obtained from a plant. Which part of the plant yields the drug? | |||
| stem bark | fruit | ||
| leaves | root | ||
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| 180)A preparation of living of killed micro-organisms or viruses used in the prevention of disease through immunization is called | |||
| vaccine | toxoid | ||
| viremia | anti-toxin | ||
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