Germination of pollen grain on the stigm...

Germination of pollen grain on the stigma is

gemination in situ

germination in vivo

germination of vitro

autogamy

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The correct Answer is:

In vitro-Germination in artifical medium in Vivo-an living medium. In situ-within mother cell.

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The pollen grain is

Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) Ovary, (ii) Male germ-cell, (ii) Female-germ cell and (iv) ovule on it.

Draw a diagram showing germination of pollen on, stigma of a flower.

(i) Draw a diagram showing germination of pollen on stigma of a flower. (ii) Label pollen grain, male germ cells, pollen tube and female germ cell in the above diagram. (iii) Define fertilization in plants.

[A] : Xenogamy is defined as the transferance of pollen grain to stigma of same flower. [R] : In xenogamy, the pollen frain of a flower are transferred to stigma of a different flower of a different plant of different species.

Which of the following statement(s) is/are true about self-incompatibility? (i) It is a device to prevent inbreeding. (ii) It provides a biochemical block to self-fertilization. (iii) It ensures cross-fertilization (iv) It is governed by pollen-pistil interaction. (v) It is governed by series of multiple alleles. (vi) It prevents self-pollen (from the same flower of other flowers of the same plant) from fertilizing the ovules by inhibiting pollen germination of pollen tube growth in the pistil.

Distinguish between unisexual and bisexual flowers giving one example of each. Draw a neat diagram showing fertilisation in a flower and label: a] Pollen tube b] Male germ cell c] Female germ cell, on it. OR Draw the diagram showing the germination of pollen on stigma and label the part on which pollination takes place. Answer the following questions based on diagram given aside. i] Name the part marked 'P. in the diagram. ii] How does 'P. reach part 'B'? iii] State the importance of the part 'C'. iv] What happens to the part marked 'D' after fertilisation is over? Mention the role of gamete and zygote in sexually reproducing organisms.

TRUEMAN BIOLOGY-SEXUAL REPRODUCTION IN FLOWERING PLANTS-MULTIPLE CHOICE QUESTIONS

In angiosperm, syngamy or true fertilization refers to
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Movement of pollen tube towards embryo sac is
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Germination of pollen grain on the stigma is
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At the time of entering embryo sac the pollen tube contains
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Doubles fertilization is fusion of
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Route used by pollen tube for entering ovule is
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Write the significance of double fertilization.
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The second fertilization in angiosperms is known as
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Entry of pollen tube through micropyte while reaching the embryo sac...
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When pollen tube enters by integuments then the process is called
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In angiosperms, pollen tube liberates its male gamets into:
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Total number of nuclei involved in double fertilization is
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Pollen tube enters the embryo sac usually
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Development of embryo in angiosperm is
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The wheat grain/maize grain has an embryo with one, large, shield shap...
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Pollination is stimulus necessary for the fruit development. It can be...
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Ovule integument gets tranformed into
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Endosperm in angiosperms is formed from secondary nucleus
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Endosperm of angiosperms is different from that of gymnosperms becaus...
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The most common type of development of endosperm is
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