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Bryophyta

Side by side ...

Question

Side by side with the development of endosperm, the zygote or oospore
forms .............

A

Only seed

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B

Embryo

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C

Only testa

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D

None of the above

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Solution

The correct option is B Embryo
In both gymnosperms and angiosperms, the oospore will form zygote as a result of fertilization. Then, it develops with the expense of endosperm, which works as a nourishment layer for the growing embryo.

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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.
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Q. Describe the development of endosperm after double fertilization in an angiosperm. Why does endosperm development preceeds that of zygote?

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. 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.

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