Inbreeding depression is -
1. | Reduced motility and immunity due to close inbreeding |
2. | Decreased productivity due to mating of superior male and inferior female |
3. | Decrease in body mass of progeny due to continued close inbreeding |
4. | Reduced fertility and productivity due to continued close inbreeding |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following four statements (I-IV) and select the option which includes all the correct ones only :
I. | Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc. |
II. | Body weight-wise, the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than that produced by a cow per day through its milk. |
III. | Common button mushrooms are a very rich source of vitamin C. |
IV. | A rice variety has been developed which is very rich in calcium. |
1. Statements (I), (III) and (IV)
2. Statements (II), (III) and (IV)
3. Statements (I), (II)
4. Statements (III), (IV)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGreen revolution in India occurred during -
1. 1970's
2. 1980's
3. 1950's
4. 1960's
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe name of Norman Borlaug is associated with-
(1) Green Revolution
(2) White Revolution
(3) Yellow Revolution
(4) Blue Revolution
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is generally used for induced mutagenesis in crop plants ?
1. Gamma rays (from cobalt 60)
2. Alpha particles
3. X rays
4. UV (260 nm)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThree crops that contribute maximum to global food grain production are -
(1) Wheat, rice and maize
(2) Rice, maize and sorghum
(3) Wheat maize and sorghum
(4) Wheat, rice and barley
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhy is vivipary an undersirable character for annual crop plants -
1. It reduces the vigour of the plant
2. The seeds exhibit long dormancy
3. It adversely affects the fertility of the plant
4. The seeds cannot be stored under normal conditions for the next season
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIndia's wheat yield revolution in the 1960s was possible primarily due to :-
(1) Increased chlorophyll content
(2) Mutations resulting in plant height reduction
(3) Quantitative trait mutations
(4) Hybrid seeds
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe technique of obtaining large number of plantlets by tissue culture method is called –
(1) Organ culture
(2) Micropropagation
(3) Macropropagation
(4) Plantlet culture
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich fungal disease spreads by seed and flowers : -
(1) Loose smut of Wheat
(2) Corn stunt
(3) Covered smut of Barley
(4) Soft rot of Potato
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology