1. A
   Acquired Immunity
2. B
   Innate Immunity
3. C
   Cell-mediated Immunity
4. D
   Humoral Immunity

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1. A
   Sexual reproduction
2. B
   Asexual reproduction
3. C
   Nutrient absorption
4. D
   Gaseous exchange

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1. A
   Liver and intestine
2. B
   Liver and kidney
3. C
   Kidney and intestine
4. D
   Kidney and lower part of body

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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
   It is active only in the dark
2. B
   It has higher affinity for oxygen than carbon dioxide
3. C
   It is an enzyme involved in the photolysis of water
4. D
   It catalyzes the carboxylation of RuBP

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1. A
   C and D only
2. B
   A and B only
3. C
   D and E only
4. D
   B and C only

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1. A
   A, B, C only
2. B
   A, C, E only
3. C
   A, D, E only
4. D
   B, D, E only

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1. A
   $\alpha$ (alpha)
2. B
   $\sigma$ (sigma)
3. C
   $\rho$ (rho)
4. D
   $\gamma$ (gamma)

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1. A
   The statement is true for water but false for land
2. B
   The statement is true for both the environment
3. C
   The statement is false for water but true for land
4. D
   The statement is false for both the environment

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1. A
   They are monozygotic twins.
2. B
   They are fraternal twins.
3. C
   They were conceived through in vitro fertilization.
4. D
   They have 75% identical genetic content.

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1. A
   A and B only
2. B
   A and C only
3. C
   C and D only
4. D
   C and E only

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1. A
   A-IV, B-II, C-I, D-III
2. B
   A-IV, B-II, C-III, D-I
3. C
   A-II, B-IV, C-I, D-III
4. D
   A-III, B-II, C-IV, D-I

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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
   $\frac{dN}{dt} = r\left(\frac{K-N}{K}\right)$
2. B
   $\frac{dN}{dt} = rN\left(\frac{K-N}{K}\right)$
3. C
   $\frac{dN}{dt} = rN\left(\frac{N-K}{N}\right)$
4. D
   $\frac{dN}{dt} = N\left(\frac{r-K}{K}\right)$

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