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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The endosperm is completely consumed by the developing embryo in all of the following except:

(1) Pea

(2) Groundnut

(3) Beans

(4) Castor

Subtopic:  Seed |
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Epicotyl has a shoot apex and a few leaf primordial enclosed in a hollow foliar structure called as the:

(1) Coleoptile

(2) Coleorhiza

(3) Scutellum

(4) Perisperm

Subtopic:  Embryo |
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The micropyle remains as a small pore in the seed coat. During germination, this facilitates entry of:

I. Oxygen

II. Water

(1) Only I

(2) Only II

(3) Both I and II

(4) Neither I nor II

Subtopic:  Seed |
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Why do seeds need water to germinate?

(1) Following hydration, enzymes break down stored food and make it available for the embryo.

(2) Water provides energy.

(3) Water activates the chlorophyll molecules so that photosynthesis can begin.

(4) Water dissolves the minerals in the soil so that they become available to the seed.

Subtopic:  Seed |
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