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Botany MCQs for NEET — Practice Questions with Answers

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A typical angiosperm anther is dithecous which means that it is:

One lobed and the lobe has two theca

Two lobed and each lobe has two theca

Two lobed and each lobe has one theca

Four lobed and each lobe has two theca

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Explanation

Read page 21, XII NCERT

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Which of the following layers in the wall of an anther nourishes the developing pollen grains?

Tapetum

Epidermis

Endothecium

Middle layers

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Explanation

Read page 21, XII NCERT

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The pistil of Papaver is:

Monocarpellary

Multicarpellary apocarpous

Multicarpellary syncarpous

Absent

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Explanation

Read page 25, Figure 2.7, XII NCERT

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The only type of pollination that brings genetically different types of pollen grains to the stigma is:

Chasmogamy

Cleistogamy

Geitonogamy

Xenogamy

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Explanation

Read page 28, XII NCERT

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The aquatic plant in which pollination is not carried out by water is:

Vallisneria

Water lily

Zostera

Hydrilla

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Explanation

Read page 29, XII NCERT

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Dioecy in plants prevents:

Autogamy but not geitonogamy

Geitonogamy but not autogamy

Both autogamy and geitonogamy

Neither autogamy nor geitonogamy

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Explanation

Read page 31, XII NCERT

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The central cell in the embryo sac, after triple fusion, becomes:

Primary endosperm cell

Endosperm

Embryo

Zygote

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Explanation

Read page 34, XII NCERT

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

Coleoptile

Coleorhiza

Scutellum

Perisperm

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Explanation

Read page 36, XII NCERT

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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

Only I

Only II

Both I and II

Neither I nor II

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Explanation

Read page 36, XII NCERT

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Why do seeds need water to germinate?

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

Water provides energy.

Water activates the chlorophyll molecules so that photosynthesis can begin.

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

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Explanation

Hint: Water has something to do with enzyme

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