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

Subtopic:  Stamen: Anther |
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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

Subtopic:  Stamen: Anther |
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Pollen intine is made of:

1. Sporopollenin

2. Cellulose and pectin

3. Ergosterol

4. Phospholipids and cholesterol

Subtopic:  Stamen: Male Gametophyte |
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Pollen grains lose their viability within 30 minutes of their release in:

1. Rose

2. Potato

3. Pea

4. Wheat

Subtopic:  Stamen: Male Gametophyte |
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The pistil of Papaver is:

1. Monocarpellary

2. Multicarpellary apocarpous

3. Multicarpellary syncarpous

4. Absent

Subtopic:  Pistil: Ovule |
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How many of the nuclei in the female gametophyte in angiosperms are surrounded by cell wall?

(1) 5

(2) 6

(3) 7

(4) 8

Subtopic:  Pistil: Female Gametophyte |
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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

Subtopic:  Pollination & Outbreeding Devices |
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Dioecy in plants prevents:

(1) Autogamy but not geitonogamy

(2) Geitonogamy but not autogamy

(3) Both autogamy and geitonogamy

(4) Neither autogamy nor geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
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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

Subtopic:  Pollination & Outbreeding Devices |
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The central cell in the embryo sac, after triple fusion, becomes:

(1) Primary endosperm cell

(2) Endosperm

(3) Embryo

(4) Zygote

Subtopic:  Double Fertilization |
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