1. A
   Both A and R are true and R is the correct explanation of A.
2. B
   Both A and R are true but R is NOT the correct explanation of A.
3. C
   A is true but R is false.
4. D
   A is false but R is true.

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1. A
   M phase
2. B
   S phase
3. C
   $G_1$ phase
4. D
   $G_2$ phase

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1. A
   Both A and R are true and R is the correct explanation of A
2. B
   Both A and R are true but R is NOT the correct explanation of A
3. C
   A is true but R is false
4. D
   A is false but R is true

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1. A
   Zygotene
2. B
   Pachytene
3. C
   Diplotene
4. D
   Diakinesis

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1. A
   Frederick Griffith
2. B
   Alfred Hershey and Martha Chase
3. C
   Avery, Macleod and McCarthy
4. D
   Wilkins and Franklin

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1. A
   Both A and R are correct and R is the correct explanation of A
2. B
   Both A and R are correct but R is NOT the correct explanation of A
3. C
   A is correct but R is not correct
4. D
   A is not correct but R is correct

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1. A
   Platinum
2. B
   Zinc
3. C
   Tungsten or gold
4. D
   Silver

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1. A
   Mustard, Cucumber and Primrose
2. B
   China rose, Beans and Lupin
3. C
   Tomato, Dianthus and Pea
4. D
   China rose, Petunia and Lemon

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1. A
   Photosynthetically active radiation
2. B
   Respiratory quotient
3. C
   Respiratory loss
4. D
   Reproductive allocation

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1. A
   Differentiation
2. B
   Dedifferentiation
3. C
   Development
4. D
   Senescence

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1. A
   Transcription of tRNAs
2. B
   Transcription of rRNAs (28S, 18S and 5.8S)
3. C
   Transcription of precursor of mRNA
4. D
   Transcription of only snRNAs

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1. A
   Bright red colour
2. B
   Bright blue colour
3. C
   Bright yellow colour
4. D
   Bright orange colour

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1. A
   Dobson units
2. B
   Decibels
3. C
   Decameter
4. D
   Kilobase

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1. A
   $GA_3$
2. B
   Kinetin
3. C
   Ethylene
4. D
   2, 4-D

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1. A
   Synergids, Primary endosperm nucleus and zygote
2. B
   Antipodals, synergids, and primary endosperm nucleus
3. C
   Synergids, Zygote and Primary endosperm nucleus
4. D
   Synergids, antipodals and Polar nuclei

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1. A
   It is not a carbohydrate
2. B
   It is a helical molecule
3. C
   It does not contain complex helices and hence cannot hold iodine molecules
4. D
   It breaks down when iodine reacts with it

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1. A
   Habitat loss and fragmentation
2. B
   Over exploitation for economic gain
3. C
   Alien species invasions
4. D
   Co-extinctions

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1. A
   Lycopodium and Selaginella
2. B
   Selaginella and Salvinia
3. C
   Psilotum and Salvinia
4. D
   Equisetum and Salvinia

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1. A
   Diadelphous and Dithecous anthers
2. B
   Polyadelphous and epipetalous stamens
3. C
   Monoadelphous and Monothecous anthers
4. D
   Epiphyllous and Dithecous anthers

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1. A
   1985
2. B
   1992
3. C
   1986
4. D
   2002

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1. A
   RNA
2. B
   DNA
3. C
   Histones
4. D
   Polysaccharides

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1. A
   To attract insects
2. B
   To trap pollen grains
3. C
   To disperse pollen grains
4. D
   To protect seeds

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1. A
   Both Statement I and Statement II are correct
2. B
   Both Statement I and Statement II are incorrect
3. C
   Statement I is correct but Statement II is incorrect
4. D
   Statement I is incorrect but Statement II is correct

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1. A
   Indole-3-butyric Acid
2. B
   Gibberellic Acid
3. C
   Zeatin
4. D
   Abscisic Acid

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1. A
   Manganese
2. B
   Molybdenum
3. C
   Magnesium
4. D
   Copper

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