Q. No.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
Difficulty Level:
Which of the following layers in the wall of an anther nourishes the developing pollen grains?
1. Tapetum
2. Epidermis
3. Endothecium
4. Middle layers
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Pollen intine is made of:
1. Sporopollenin
2. Cellulose and pectin
3. Ergosterol
4. Phospholipids and cholesterol
Difficulty Level:
Pollen grains lose their viability within 30 minutes of their release in:
1. Rose
2. Potato
3. Pea
4. Wheat
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The pistil of Papaver is:
1. Monocarpellary
2. Multicarpellary apocarpous
3. Multicarpellary syncarpous
4. Absent
Difficulty Level:
How many of the nuclei in the female gametophyte in angiosperms are surrounded by cell wall?
(1) 5
(2) 6
(3) 7
(4) 8
Difficulty Level:
The only type of pollination that brings genetically different types of pollen grains to the stigma is:
(1) Chasmogamy
(2) Cleistogamy
(3) Geitonogamy
(4) Xenogamy
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The aquatic plant in which pollination is not carried out by water is:
(1) Vallisneria
(2) Water lily
(3) Zostera
(4) Hydrilla
Difficulty Level:
Dioecy in plants prevents:
(1) Autogamy but not geitonogamy
(2) Geitonogamy but not autogamy
(3) Both autogamy and geitonogamy
(4) Neither autogamy nor geitonogamy
Difficulty Level:
If the female parent produces unisexual flower:
(1) Emasculation must be done before maturity
(2) Emasculation must be done after maturity
(3) Emasculation must be done before pollination
(4) Emasculation is not needed
Difficulty Level:
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