Q. No.| 1. | Protection of pollen grains only |
| 2. | Nourishment and providing sporopollenin for exine formation |
| 3. | Separation of microspore tetrads |
| 4. | Formation of the anther wall |
| 1. | Endothecium and it provides nutrition to pollens |
| 2. | Tapetum and it nourishes the developing pollen grains |
| 3. | Nucellus and it forms microspores |
| 4. | Endothecium and it helps in dehiscence of anther |
Which of the following structure is not associated with protection and dehiscence of anther?
1. Tapetum
2. Epidermis
3. Endothecium
4. Middle layer
Which of the following statement is not associated with the 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. |
Arrange the layers of anther wall from locus to periphery:
1. Epidermis, middle layers, tapetum, endothecium
2. Tapetum, middle layers, epidermis, endothecium
3. Endothecium, epidermis, middle layers, tapetum
4. Tapetum, middle layers, endothecium, epidermis
| 1. | connective | 2. | placenta |
| 3. | thalamus or petal | 4. | anther |
A typical angiospermic anther
1. Is monothecous and bisporangiate
2. Shows the two pollen sacs in an anther lobe which are separated internally by strip of fertile tissue
3. Dithecous and tetrasporangiate
4. Is a mass of homogeneous meristematic cells in mature stage
ll. The pollen grain represents the male gametophyte.
lll. Pollen grains are usually triangular and 10-15 µm in diameter.
lv. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids and
alkali.
1. l, II are incorrect but Ill, IV are correct
2. lll, IV are incorrect but I, II are correct
3. I, Ill are incorrect but ll, IV are correct
4. II, IV are correct but I, Ill are incorrect
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
A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by:
(1) A longitudinal groove running lengthwise
(2) A longitudinal groove running breadth wise
(3) A transverse groove running breadth wise
(4) A transverse groove running lengthwise
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