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

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1. A
   Annelids and arthropods-Bilateral symmetry
2. B
   Sponges-Acoelomates
3. C
   Coelenterates and Ctenophores-Radial symmetry
4. D
   Platyhelminthes-Diploblastic organisation

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

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

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

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1. A
   Renin from JG cell via switching off the osmoreceptors
2. B
   ANF from atria of the heart
3. C
   Aldosterone from adrenal medulla
4. D
   Vasopressin from Neurohypophysis

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

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1. A
   Silurian, Devonian, Permian, Carboniferous
2. B
   Silurian, Devonian, Carboniferous, Permian
3. C
   Permian, Devonian, Silurian, Carboniferous
4. D
   Silurian, Carboniferous, Permian, Devonian

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1. A
   closure of the semilunar valves
2. B
   opening of tricuspid and bicuspid valves
3. C
   opening of the semilunar valves
4. D
   closure of the tricuspid and bicuspid valves

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

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

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

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

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1. A
   C $\rightarrow$ A $\rightarrow$ D $\rightarrow$ E $\rightarrow$ B
2. B
   A $\rightarrow$ B $\rightarrow$ E $\rightarrow$ D $\rightarrow$ C
3. C
   A $\rightarrow$ C $\rightarrow$ E $\rightarrow$ D $\rightarrow$ B
4. D
   D $\rightarrow$ B $\rightarrow$ E $\rightarrow$ C $\rightarrow$ A

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

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

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

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

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

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1. A
   'a' represents exponential growth when responses are not limiting the growth; and 'b' represents logistic growth when responses are limiting the growth.
2. B
   'a' represents logistic growth when responses are not limiting the growth; 'b' represents exponential growth when responses are limiting the growth.
3. C
   'a' represents carrying capacity and 'b' shows logistic growth when responses are limiting the growth.
4. D
   'a' represents exponential growth when responses are not limiting the growth and 'b' shows carrying capacity.

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

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

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

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

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1. A
   $A.B + \bar{A}$
2. B
   $A.\bar{B} + \bar{A}$
3. C
   $\bar{B}$
4. D
   $B$

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