A widely accepted theory of ascent of sap is

1.  Inhibition theory

2.  Negative tension theory

3.  Cohesion tension theory

4.  Capillary theory

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4
Correct Answer :

Cohesion tension theory


Explanation :
No Explanation available for this question

Most reduced form of stem is found in

1.  bulb

2.  phylloclade

3.  stolon

4.  rhizome

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4
Correct Answer :

bulb


Explanation :
No Explanation available for this question

The vessels of heart wood are blocked by

1.  strip

2.  hair

3.  tumour

4.  tyloses

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4
Correct Answer :

tyloses


Explanation :
No Explanation available for this question

Any moment medium can be made semisolid by adding

1.  starch

2.  agar agar

3.  sucrose

4.  gum

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4
Correct Answer :

agar agar


Explanation :
No Explanation available for this question

Thylakoids are present in

1.  chloroplast

2.  nucleus

3.  mitochondrion

4.  peroxisome

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4
Correct Answer :

chloroplast


Explanation :
No Explanation available for this question

Chiasma represents the sites of:

1.  disjunction

2.  terminalization

3.  crossing over

4.  synapsis

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4
Correct Answer :

crossing over


Explanation :
No Explanation available for this question

In Spirogyra sexual reproduction takes place by

1.  antheridia and archaegonia

2.  hormogonia

3.  trichome

4.  conjugation

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4
Correct Answer :

conjugation


Explanation :
No Explanation available for this question

Identify the scientists worked extensively on chlorophyllous and non-chlorophyllous Thallophytes, respectivelyI. Iyengar      II. Swaminathan      III. Mehta            IV. MaheswariThe correct pair is

1.  I, IV

2.  I, III

3.  II, III

4.  III, IV

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4
Correct Answer :

I, III


Explanation :
No Explanation available for this question

Which of the following two are the resultants of stipule modificationsI. Spines in ZiziphusII. Tendrils in SmilaxIII. Tendrils in NepenthesIV. Spines in ArgemoneV. Thorns in BougainvilleaThe correct pair is

1.  I, III

2.  I, II

3.  II, V

4.  III, V

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4
Correct Answer :

I, II


Explanation :
No Explanation available for this question

Which one of the following conditions is seen in the roots of a plant having submerged assimilatory roots and spongy petioles

1.  Triarch

2.  Monarch

3.  Tetrarch

4.  Diarch

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4
Correct Answer :

Monarch


Explanation :
No Explanation available for this question
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