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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.
विकल्प
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.
उत्तर
A and R are true, R is the correct explanation of A
संबंधित प्रश्न
The following is the illustration of the sequence of ovarian events (a − i) in a human female
(i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.
(iii) Explain the changes that occur in the uterus simultaneously in anticipation.
(iv) Write the difference between ‘c’ and ‘h’.
(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.
Define spermiation.
Describe the process of oogenesis in human female.
Mammalian egg is ____________.
The Androgen Binding Protein (ABP) is produced by ____________.
Which of the following occurs during maturation phase of spermatogenesis?
500 spermatozoa are formed from ____________ secondary spermatocytes.
First meiotic division is observed in ____________.
The human male gamete is usually about ______ in length.
By which process sperms released from the seminiferous tubules?
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
Connective tissue around seminiferous tubules possess endocrine cells called ______.
The cell which undergoes meiosis I during spermatogenesis is the ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
At what stage of life is oogenesis initiated in a human female?
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:
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring, What are the processes through which these events take place?
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
Distinguish between human sperm and ovum.
What is spermatogenesis?
