The micropyle in a seed helps in the entry of

Important Questions on Sexual Reproduction in Flowering Plants

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 17

The tegmen of the seed develops from-

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 19

Choose the wrong pair.

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 20

Given below the following statements
A. Pollen grains are spherical and measures $25-50\mathrm{\mu m}$ in diameter.
B. At germpore sporopollenin is absent
C. Pollen grain consumption increase performance of athletes and race horses
D. Pollen grains are shed in two celled stage in more than $60\%$ angiospermic plants
How many statements are wrong -

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 21

What will be the ploidy of nucellus, endosperm, female gametophyte and antipodal cells?

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 22

Mark the incorrect statements-
A. Dioecy prevents both autogamy and geitonogamy
B. Self incompatibility prevents inbreeding
C. Geitonogamy is ecological cross pollination but genetically it is similar to autogamy
D. Both xenogamy and Geitonogamy decrease inbreeding depression

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 23

In the given figure $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}$ are:

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 24

The correct sequence of embryo formation is-
(a) Heart-shaped, globular, mature embryo, pro embryo.
(b) Pro embryo, mature embryo, globular, heart-shaped.
(c) Globular, pro embryo, heart-shaped, mature embryo.
(d) Pro embryo, globular, heart-shaped, mature embryo.

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Alpha Question Bank for Medical: Biology>Chapter 24 - Sexual Reproduction in Flowering Plants>Exercise-2>Q 25

How many statements are correct?
(a) Transfer of pollen grains from the anther to the stigma of another flower of the same plant is known as geitonogamy.
(b) Pollination by water is quite rare in flowering plants and is limited to about 30 genera.
(c) Majority of insect-pollinated flowers are large, colourful, fragrant and rich in nectar.
(d) Pollination guarantees the transfer of the right type of pollen (compatible pollen of the same species as the stigma).