Thirty seeds each of Dolichos, Pisum and Maize are kept for germination in the soil, How many cotyledons are found above the soil and below the soil respectively when all the seeds germinate

1.  60, 60

2.  60, 90

3.  90, 90

4.  30, 60

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4
Correct Answer :

60, 90


Explanation :
No Explanation available for this question

Identify the correct pair of  statements :I) The filiform apparatus helps in absorption of foodII) Antipodals are the vegetative cells of female gametophyteIII) The fusion of two polar nuclei occurs always before the entry of pollen tubeIV) The largest cell of embryosae is the egg cell The correct pair is:

1.  (I), (II)

2.  (II), (III)

3.  (I), (IV)

4.  (III), (IV)

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4
Correct Answer :

(I), (II)


Explanation :
No Explanation available for this question

A student observed a plant with satellite hairs on vegetative parts and the fruit dehiscing into many seeded mericarps, which one of the following characters is also associated with that plant

1.  Failure of the germination of pollen grains on the stigma of the same flower

2.  Presence of monosiphonous pollen grains

3.  3-10 bracteoles forming a whorl on the calyx

4.  Two carpets in the gynoccium of a flower

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4
Correct Answer :

Failure of the germination of pollen grains on the stigma of the same flower


Explanation :
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Of the four plants (A, B, C and D) observed. 'A' was selected by Mendel for his hybridization experiments, while in 'B' Shull found inbreeding depression and it is a day neutral plant. In 'C' Hugo de vries discovered mutations. 'D' has bicollateral vascular bundles and straight embryos. Identify the characters of – A, B, C and D in correct order:The correct order is:

1.  Pulvinus leaf base. Kranz anatomy, Tricarpellary gynoecium, septicidal capsule

2.  Foliaceous supules, Scutellum, Tetracarpellary gynoecium, Septifragal capsule

3.  Piston mechanism, Eustele, Monocarpellary gynoccium, Swollen placenta

4.  Monadelphous stamens, still roofs, Ricarpellary gynoecium unilocular ovary

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4
Correct Answer :

Foliaceous supules, Scutellum, Tetracarpellary gynoecium, Septifragal capsule


Explanation :
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The ratio of chromosomal number of pollen grain of Nicotiana tabacum endosperm cell of Oryza sativa and root cell of Allium cepa is:

1.  6:9:4

2.  3:8:2

3.  3:9:2

4.  4:7:6

View Answer  
4
Correct Answer :

6:9:4


Explanation :
No Explanation available for this question

A DNA fragment of 204 A was separated by a scientist from the nuclear genome of the plant. What will be the ratio between the number of two and three hydrogen bonds formed in the components of this fragment if it contains 40% Adenine

1.  2 : 3

2.  1 : 3

3.  4 : 1

4.  1 : 4

View Answer  
4
Correct Answer :

4 : 1


Explanation :
No Explanation available for this question

Identify the wrong pair of statements from the following:I) Cell organelles are newly formed in 'G2' phase of cell cycleII) Doubling of chromosomes occur in 'S' phase of cell cycleIII) The nuclei formed after meiosis-1 are haploidIV) Terminalization occurs in Anaphase-I

1.  (I), (IV)

2.  (II), (IV)

3.  (III),(IV)

4.  (I),(III)

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4
Correct Answer :

(II), (IV)


Explanation :
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The correct order of plants which exihibits laticiferous cells and lysigenous respectively

1.  Hevea, pinus

2.  Citrus, pothos

3.  Ficus, Carica

4.  Nerium, Citrus

View Answer  
4
Correct Answer :

Nerium, Citrus


Explanation :
No Explanation available for this question

Study the following lists: List – I List – II A.Zacharias Janssen I.Sexual reproduction B.Camerarius II.Conduction of water C.Stephen Hales III.Compound microscope D.Knoll and Ruska IV.Crystallization of urease V.Electron microscope

1.  V II IV III

2.  III I II V

3.  II IV I III

4.  V II III I

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4
Correct Answer :

III I II V


Explanation :
No Explanation available for this question

Which one of the following has epiphytic features and flattened photosynthetic roots, without formal organisation of stem and leaves

1.  Tinospora

2.  Trapa

3.  Taeniophyllum

4.  Vanda

View Answer  
4
Correct Answer :

Taeniophyllum


Explanation :
No Explanation available for this question
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