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Answer the following type of question Assertion (A) and Reason (R) (A) - In human male, testes are extra abdominal and lie in scrotal sacs. - Zoology

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प्रश्न

Answer the following type of question Assertion (A) and Reason (R).

(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.

(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.

पर्याय

  • A and R are true, R is the correct explanation of A.

  • A and R are true, R is not the correct explanation of A.

  • A is true, R is false.

  • Both A and R are false.

MCQ

उत्तर

A and R are true, R is the correct explanation of A

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Human Reproduction - Evaluation [पृष्ठ २८]

APPEARS IN

सामाचीर कलवी Biology (Zoology) [English] Class 12 TN Board
पाठ 2 Human Reproduction
Evaluation | Q 16. | पृष्ठ २८
सामाचीर कलवी Biology (Zoology) [English] Class 12 TN Board
पाठ 2 Human Reproduction
Evaluation | Q 14. | पृष्ठ २८

संबंधित प्रश्‍न

Give the name and function for ‘A’ and ‘B’ from the diagram given below


With the help of diagrammatic representation, explain the process of gametogenesis


The process of release of the ovum from a mature follicle is called __________.


Fill in the blank. 

 Implantation of embryo occurs in ------ 


Sex organs produce gametes which are diploid.


At what stage of development are the gametes formed in newborn male and female?


Describe the structure of the human ovum with a neat labelled diagram.


Identify the CORRECT sequence of events.


Identify the enzyme released by the sperm which has lytic activity.


Four primary spermatocytes give rise to ______.


Spermiation is the process of the release of sperms from ______.


Select the correct sequence of stages of spermatogenesis in a human male ______.


Mark the odd one.


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?


3-celled male gamete develops in:


Which of the following cells during gametogenesis is normally diploid?


Capacitation refers to changes in the ______.


What is the difference between a primary oocyte and a secondary oocyte?


What is spermatogenesis?


Draw a neat and labelled diagram of spermatogenesis.


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