Q. No.Match column I with column II and select the correct option from the given codes.
| Column - I | Column - II | ||
| A. | Parthenocarpy | (i) | Seed formation without fertilization |
| B. | Polyembryony | (ii) | More than one embryo in same seed |
| C. | Apomixis | (iii) | Seedless fruits without fertilization |
| D. | Somatic embryogenesis | (iv) | Embryo develops from a somatic cell |
1. A - (iv), B - (ii), C - (iii), D - (i)
2. A - (iii), B - (ii), C - (i), D - (iv)
3. A - (i), B - (iv), C - (iii), D - (ii)
4. A - (ii), B - (iii), C - (i), D - (iv)
Which of the following statement is not associated with phenomenon of flowering?
(1) Decision for flowering takes place much before actual flower appears.
(2) During flowering several structural and hormonal changes takes place
(3) During flowering differentiation takes place
(4) Flowering is independent of environmental factors
The cells of which of the following layers of the anther wall are multinucleated due to endomitosis?
(1) Epidemis
(2) Endothecium
(3) Middle layer
(4) Tapetum
A typical angiosperm anther is dithecous which means that it is:
1. One lobed and the lobe has two theca
2. Two lobed and each lobe has two theca
3. Two lobed and each lobe has one theca
4. Four lobed and each lobe has two theca
Which one of the following statements is not true?
| 1. | Exine of pollen grains is made up of sporopollenin |
| 2. | Pollen grains of many species cause severe allergies |
| 3. | Stored pollen in liquid nitrogen can be used in the crop breeding programmes |
| 4. | Tapetum helps in the dehiscence of anther |
What is the charasteristic of tapetum ?
(1) It does not store food.
(2) It is multi-nucleated.
(3) It is multi-layered structure.
(4) It nourishes the megaspore.
What is the number of microsporangia in each lobe of an angiosperm anther?
(1) Four
(2) Two
(3) Eight
(4) One
Which among the following extend longitudinally to become pollen sac?
(1) Microsporangia
(2) Filament of anther
(3) Tapetum
(4) Endothecium
Which among the following is not a wall layer of microsporangium?
(1) Endothecium
(2) Nucellus
(3) Tapetum
(4) Middle layers
All of the following statements are correct except:
| 1. | The proximal end of the filament is attached to the thalamus or the petal of the flower. |
| 2. | The anther is a four-sided structure consisting of four microsporangia, two in each lobe.
|
| 3. | The number and length of stamens are variable in flowers of different species.
|
| 4. | In a longitudinal section, a typical microsporangium appears near circular in outline. |
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