51.  

In order to find out VITAL INDEX in Rampur Village, following information was gathered
Death Rate = 1/x Birth Rate = z
Average population = 1/y
What is the Vital Index ?

A. xyz X 100

B. z/xy =100

C. xy/z X 100

D. 100/xyz

Answer : Option A

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52.  

What is the true for the community ecology diagram ?

A. Involvement of 4 individuls of a population

B. Involvement of 4 population of a species

C. Involvement of 4 species of a community

D. Involvement of 4 speces of 4 ecosystem

Answer : Option C

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53.  

Match the column I with column II
Column I Column II
(1) Astacus          (p) Hydrophiic skin
(2) Marine turtle  (q) green gland
(3) Spiny lizard    (r) water storage in intestine
(4) Uromatrix       (s) salt glands

A. (1-q), (2-s), (3-p) (4-r)

B. (1-s), (2-q), (3-p) (4-r)

C. (1-s), (2-p), (3-q) (4-r)

D. (1-p), (2-q), (3-s) (4-r)

Answer : Option A

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54.  Which of the following is incorrect if ‘O’ sign is used for benificial and ‘+’ sign for harmful ?

A. Penicillium <--> Gram +ve bacteria ; Penicillium: ‘+’

B. Rhizobium <---> palnt - leguminosae family : Both ‘O’

C. Tiger <--> Rabbit ; Tiger : ‘O’

D. Shank fish <---> Suckerfish ; Suckerfish ; ‘O’

Answer : Option A

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55.  

What will happen if ‘X’ which is related to this reaction is absent ?

A. Deconposition, essential process like death, will stop

B. Damage to ecosystem

C. Begining of the food chain is not possible

D. All the statements given are correct

Answer : Option D

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56.  In the section of lichen which layer is seen just below “ upper cortex”

A. Medulla

B. Algal layer

C. lowercortex

D. All of these

Answer : Option D

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57.  

What is true for the given statements ?
Statement X : Protopterus aestivate during winter to overcome dry period Statement Y : The
process of aestivation in protopterus is to overcome unfavourable condition

A. Both statements are true

B. X-Correct Y- wrong

C. Both statements are wrong

D. X- wrong Y- correct

Answer : Option D

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58.  

What is true for the given statement ?
Statement X : Most of the animals and almost all the plants cannot keep up their internal
enviornment constant
Statement Y : process of osmoregulation in plants is an example of this

A. Both statements are true

B. X - correct, Y- wrong

C. Both statements are wrong

D. X- wrong, Y- correct

Answer : Option A

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59.  

which type of pyramid is true for the population having more number of pre reproductive and re
productive age group ?

A. a = post reproductive age group

B. b = reproductive age group

C. c = pre reproductive age group

D. None

Answer : Option B

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60.  X= Arthropods, Y = Mollusca, z = Coelenterates :-If the X by using Y, lives benifical life with z, then which of the following is correct example ?

A. X = cockroachY = pearl oyester Z = Hydra

B. X = Millipede Y = pila Z = jellyfish

C. X = Hermit crab Y = Gastropoda Z = sea anenone

D. All of these

Answer : Option C

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