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Development of Endosperm

Give reason w...

Question

Give reason why Most zygotes in angiosperms divide only when certain amount of endosperm is formed.

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Solution

Endosperm is the nourishment loaded tissue shaped amid the advancement of angiospermous seed which gives fundamental supplements to the developing incipient organism and furthermore the youthful seedling at the season of seed germination. In this way, most zygotes in angiosperms partition simply after a certain measure of the endosperm is framed.

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Q. Read the following statements related to embryogeny in plants and select the incorrect statements.

I. The early stages of embryo development are different in monocotyledons and dicotyledons.
II. Most zygotes divide only after a certain amount of endosperm is formed to ensure nutrition to the developing embryo.
III. Endosperm is completely consumed by developing embryos before seed maturation in coconut.
IV. The zygote gives rise to the proembryo and subsequently to the globular, heart-shaped and mature embryo.

Q. Choose the incorrect statement(s) from the following statements.

I. The early stages of embryo development are different in both monocotyledons and dicotyledons.
II. Most zygotes divide only after a certain amount of endosperm is formed to ensure the nutrition to the developing embryo.
III. Endosperm is completely consumed by developing embryo before seed maturation in coconut.
IV. The zygote gives rise to the proembryo and subsequently to the globular, heart-shaped and mature embryo

Q. Give reasons why endosperm in angiosperms becomes triploid.

Q. Read the following statements:
Which of the above statements are correct?
(i) Wheat, maize barley, castor and sunflower seeds are endospermic or albuminous
(ii) Most zygotes divide only after certain amount of endosperm is formed
(iii) Though the seed differ greatly, the early stages of embryo development is similar in both monocots and dicots
(iv) The zygote divides to form proembryo and subsequently globular, heart-shaped and mature embryo.
(v) Epicotyl and hypocotyl are absent in monocot seeds

Q. Assertion :In angiosperms, endosperm development precedes embryo development. Reason: Double fertilisation ensures that the nutritive tissue is formed before the zygote starts cleaving so that the energy spent on the formation of endosperm does not get wasted.

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