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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Define spermiation.

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प्रश्न

Define spermiation.

परिभाषा
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उत्तर १

Spermiation is the process of releasing mature spermatozoa. In this, spermatozoa are shed into the lumen of the seminiferous tubule for transport.

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उत्तर २

After spermiogenesis, sperm heads become embeded in sertoli cells from which they obtain their nutrition and finally get released into the lumen of seminiferous tubules. This process of release of mature sperms from sertoli cells is called spermiation.

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अध्याय 2: Human Reproduction - EXERCISES [पृष्ठ ४०]

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एनसीईआरटी Biology [English] Class 12
अध्याय 2 Human Reproduction
EXERCISES | Q 8. b. | पृष्ठ ४०
नूतन Biology [English] Class 12 ISC
अध्याय 2 Human Reproduction
NCERT EXERCISES | Q 8. (ii) | पृष्ठ ११६

संबंधित प्रश्न

Draw a labelled diagram of sperm.


What is oogenesis?


Identify True/False statement. Correct the false statement to make it true.

Oogenesis takes place in the corpus luteum.


Which precautions will you follow to maintain the reproductive health?


Explain two main process in sexual reproduction.


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?


The Androgen Binding Protein (ABP) is produced by ____________.


Expand the acronym.

hCG


Identify the labels (i-iv) in the given diagram of the ovum.


Formation of ____________ is an indication of the termination of oogenesis.


Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.


Identify the longest period of menstrual cycle.


Four primary spermatocytes give rise to ______.


Find out the CORRECT sequence of spermatogenesis.


Corona radia is made up of ______.


The head of the epididymis at the head of the testis is called ______.


Which of the following groups of cells in the male gonad, represent haploid cells?


In oogenesis haploid egg is fertilised by sperm at which stage?


Aquatic animals in which fertilisation occurs in water are said to be


What does the figure represent?


Fetal sex can be determined by examining cells from amniotic fluid looking for:


If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:


The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:


The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.


In spermatogenesis, at the end of the first meiotic division ______ are formed.


Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.


Sketch and label the process of oogenesis.


Explain Oogenesis with diagram.


Match List - I with List - IІ.

List - I List - II
A. Head I. Enzymes
B. Middle piece II. Sperm motility
C. Acrosome ΙII. Energy
D. Tail IV. Genetic material

Choose the correct answer from the options given below:


During oogenesis the meiotic division is arrested at ______ before fertilization.


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