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Human Reproduction

Question
CBSEENBI12047422
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Egg in female gametophyte is accompanied by

  • antipodal cells

  • synergids

  • definitive nucleus

  • tube nucleus

Solution

B.

synergids

Synergids are two specialised cells that lie adjacent to the egg cell in the female gametophyte of angiosperms and play an essential role in pollen tube guidance and
function. These are responsible for cessation of pollen tube growth and release of the sperm cells.

Antipodals are nutritive in function and they nourishes the embryo sac. Substances developed by these cells helps in growth and development of endosperm.

Definitive nucleus is the diploid nucleus found in the centre of the embryo.

Tube nucleus is the one of the two nuclei formed by mitotic division of a microspore during the formation of a pollen grain.

Some More Questions From Human Reproduction Chapter

Ovulation takes place :

Which of the following shows hermaphroditism and self fertilization ?

The chromosone in primary spermatocyte are :

The male reproductive system is located in the body, in the :

Sertoli cells provide :

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

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