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Q:

Because of base pairing in DNA, the percentage of

A) thymine molecules in DNA is about equal to the percentage of adenine molecules B) cytosine molecules in DNA is much greater than the percentage of guanine molecules
C) adenine molecules in DNA is about equal to the percentage of guanine molecules D) adenine molecules in DNA is much greater than the percentage of thymine molecules
 
Answer & Explanation Answer: A) thymine molecules in DNA is about equal to the percentage of adenine molecules

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Q:

Which  one  of  the  following  with  regard  to Aridisol,  one  of  the  soil  orders,  is not correct?

A) Lack  of  water  for  plants during  most part of the years B) High organic matter
C) Large  accumulation  of  carbonates  at depth D) Absence of deep wide cracks
 
Answer & Explanation Answer: B) High organic matter

Explanation:

All  are  correct  except  B  as  Aridisol is just like sand like soil as in Arid region  e.g.  In  Rajasthan,  so  there will be very less amount of organic matter.

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Q:

Dwarfness can be controlled by treating plants with

A) Gibberellic acid B) Cytokinin
C) Ethylene D) Auxin
 
Answer & Explanation Answer: A) Gibberellic acid

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Q:

What is a tissue?

A) Cells which are similar in origin, but dissimilar in form and function B) Cells which are dissimilar in origin, but are similar in form and function
C) Cells which are dissimilar in origin, form and function D) Cells which are similar in origin, form and function
 
Answer & Explanation Answer: D) Cells which are similar in origin, form and function

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Q:

Hybrid zones provide an opportunity to investigate

A) Reproductive isolation B) Speciation
C) Both 1 & 2 D) None
 
Answer & Explanation Answer: C) Both 1 & 2

Explanation:

Hybrid zones are geographical areas where two interbreeding groups of genetically unique organisms meet. Hybrid zones provide an opportunity to investigate Reproductive isolation and Speciation.

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Q:

Which of the following is not regarded as helpful to compost?

A) Egg shells B) Sawdust
C) Tea-bags D) Fish bones
 
Answer & Explanation Answer: D) Fish bones

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Q:

The reproductive parts of a flower are

A) Calyx and carpels B) Calyx and corolla
C) Corolla and stamens D) Stamens and carpels
 
Answer & Explanation Answer: D) Stamens and carpels

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Q:

Anaemic condition is due to

A) Deficiency of platelets B) Deficiency of RBC
C) Deficiency of WBC D) Deficiency of oxidants
 
Answer & Explanation Answer: B) Deficiency of RBC

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