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प्रश्न
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
उत्तर
In angiosperms, one sperm cell fuses with the egg cell to form the zygote, while the other fuses with the two polar nuclei form the endosperm which nourishes the developing embryo.
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संबंधित प्रश्न
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Draw a labelled diagram of a Graafian Follicle.
The human male gamete is usually about ______ in length.
Acrosome reaction in sperm is triggered by ______.
It The cell division in secondary oocyte is suspended at ______.
Connective tissue around seminiferous tubules possess endocrine cells called ______.
Which one is released from the ovary?
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
Distinguish between human sperm and ovum.
