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 |
 76%
From NCERT
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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 |
 95%
From NCERT
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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 |
 88%
From NCERT
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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 |
 83%
From NCERT
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The pistil of Papaver is:

1. Monocarpellary

2. Multicarpellary apocarpous

3. Multicarpellary syncarpous

4. Absent

Subtopic:  Pistil: Ovule |
 70%
From NCERT
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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 |
From NCERT
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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 |
 85%
From NCERT
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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 |
 67%
From NCERT
NEET - 2017
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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 |
 77%
From NCERT
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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 |
 78%
From NCERT
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