An Endoscope is employed by a physician to view the internal parts of a body organ. It is a based on the principle of:

1.  refraction

2.  reflection

3.  dispersion

4.  total internal reflection.

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4
Correct Answer :

total internal reflection.


Explanation :
No Explanation available for this question

In a vascular bundle, if xylem vessels develop in a centripetal fashion, the xylem is likely to be

1.  Centrarch

2.  Mesarch

3.  Exarch

4.  Endarch

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4
Correct Answer :

Exarch


Explanation :
No Explanation available for this question

Eutrophication is caused by

1.  Acid rain

2.  Nitrates and phosphates

3.  Sulphates and carbonates

4.  CO2 and CO

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4
Correct Answer :

Nitrates and phosphates


Explanation :
No Explanation available for this question

Odd pollutant amongst the following is

1.  SO2

2.  CO2

3.  CO

4.  Acid rain

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4
Correct Answer :

Acid rain


Explanation :
No Explanation available for this question

Identify the plant parts whose treansverse sections show a clearand prominent pith

1.  Dicot stem and monocot root

2.  Dicot stem and monocot stem

3.  Dicot stem and dicot root

4.  Dicot root and monocot root

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4
Correct Answer :

Dicot stem and monocot root


Explanation :
No Explanation available for this question

BOD increased by

1.  Algae

2.  Moss

3.  Ferns

4.  Distillated wastes

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4
Correct Answer :

Algae


Explanation :
No Explanation available for this question

Albuminous cells are found in…………..

1.  Phloem

2.  Galls

3.  Epidermis

4.  Xylem

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4
Correct Answer :

Phloem


Explanation :
No Explanation available for this question

Most hazardous metal pollutant of automobile exhaust is

1.  Cadmium

2.  Lead

3.  Mercury

4.  Copper

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4
Correct Answer :

Lead


Explanation :
No Explanation available for this question

The olderresin clogged secondary xylem in the central part of the tree trunk and the younger outer secondary xylem which conducts water are…….and……respectively

1.  Duramen and laburnum

2.  Laburnum and suramen

3.  Autumn wood and spring wood

4.  Spring wood and autumn wood

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4
Correct Answer :

Duramen and laburnum


Explanation :
No Explanation available for this question

Which of the following is not an air pollutant

1.  NO3

2.  SO2

3.  Hydrocarbons

4.  CO2

View Answer  
4
Correct Answer :

CO2


Explanation :
No Explanation available for this question
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