(d) A spermatogonium divides into two primary spermatocytes. Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis-I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286449
The figure given below shows the sectional view of seminiferous tubule.
Which marked structure (A to $D$ ) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
1 A
2 B
3 C
4 D
Explanation:
(b) ' $B$ ' are the secondary spermatocytes which further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286450
The figure given below shows the structure of sperm. Identify the correct feature corresponding to the marked structure A, B, C and D.
1 A - plasma membrane, B - tail, C - Acrosome, $D$ - Neck, $E$ - middle piece and $F$ - Mitochondria.
2 A-middle piece, B - plasma membrane, C-Neck, $D$ - Mitochondria, $E$ - tail and $F$ - Acrosome.
3 A - Mitochondria, B - tail, C - Neck, D - plasma membrane, $\text{E}$ - Acrosome and $\text{F}$ - middle piece.
4 A-Acrosome, B - middle piece, C - mitochondria, D - tail, $E$ - plasma membrane and F - Neck.
Explanation:
(a) In the given figure, $A,B,C,D,E$ and $F$ are marked as plasma membrane, tail, acrosome, neck, middle piece and mitochondria.
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286451
Seminal plasma in humans is rich in
1 fructose and calcium but no enzymes
2 glucose and certain enzymes but has no calcium
3 fructose and certain enzymes but poor in calcium
4 fructose, calcium and certain enzymes.
Explanation:
(d) Seminal plasma is secreted from male accessory glands & it is rich in fructose, calcium and certain enzymes.
NCERT Page-44 / N-28
Human Reproduction(NCERT)
286452
Semen is a constituent of seminal plasma with
1 ovum
2 sperm
3 zygote
4 follicle
Explanation:
(b) Semen, or seminal fluid, is an alkaline fluid that contains spermatozoa embedded in seminal plasma. Semen is ejaculated by male reproductive system during orgasm.
(d) A spermatogonium divides into two primary spermatocytes. Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis-I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286449
The figure given below shows the sectional view of seminiferous tubule.
Which marked structure (A to $D$ ) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
1 A
2 B
3 C
4 D
Explanation:
(b) ' $B$ ' are the secondary spermatocytes which further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286450
The figure given below shows the structure of sperm. Identify the correct feature corresponding to the marked structure A, B, C and D.
1 A - plasma membrane, B - tail, C - Acrosome, $D$ - Neck, $E$ - middle piece and $F$ - Mitochondria.
2 A-middle piece, B - plasma membrane, C-Neck, $D$ - Mitochondria, $E$ - tail and $F$ - Acrosome.
3 A - Mitochondria, B - tail, C - Neck, D - plasma membrane, $\text{E}$ - Acrosome and $\text{F}$ - middle piece.
4 A-Acrosome, B - middle piece, C - mitochondria, D - tail, $E$ - plasma membrane and F - Neck.
Explanation:
(a) In the given figure, $A,B,C,D,E$ and $F$ are marked as plasma membrane, tail, acrosome, neck, middle piece and mitochondria.
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286451
Seminal plasma in humans is rich in
1 fructose and calcium but no enzymes
2 glucose and certain enzymes but has no calcium
3 fructose and certain enzymes but poor in calcium
4 fructose, calcium and certain enzymes.
Explanation:
(d) Seminal plasma is secreted from male accessory glands & it is rich in fructose, calcium and certain enzymes.
NCERT Page-44 / N-28
Human Reproduction(NCERT)
286452
Semen is a constituent of seminal plasma with
1 ovum
2 sperm
3 zygote
4 follicle
Explanation:
(b) Semen, or seminal fluid, is an alkaline fluid that contains spermatozoa embedded in seminal plasma. Semen is ejaculated by male reproductive system during orgasm.
(d) A spermatogonium divides into two primary spermatocytes. Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis-I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286449
The figure given below shows the sectional view of seminiferous tubule.
Which marked structure (A to $D$ ) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
1 A
2 B
3 C
4 D
Explanation:
(b) ' $B$ ' are the secondary spermatocytes which further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286450
The figure given below shows the structure of sperm. Identify the correct feature corresponding to the marked structure A, B, C and D.
1 A - plasma membrane, B - tail, C - Acrosome, $D$ - Neck, $E$ - middle piece and $F$ - Mitochondria.
2 A-middle piece, B - plasma membrane, C-Neck, $D$ - Mitochondria, $E$ - tail and $F$ - Acrosome.
3 A - Mitochondria, B - tail, C - Neck, D - plasma membrane, $\text{E}$ - Acrosome and $\text{F}$ - middle piece.
4 A-Acrosome, B - middle piece, C - mitochondria, D - tail, $E$ - plasma membrane and F - Neck.
Explanation:
(a) In the given figure, $A,B,C,D,E$ and $F$ are marked as plasma membrane, tail, acrosome, neck, middle piece and mitochondria.
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286451
Seminal plasma in humans is rich in
1 fructose and calcium but no enzymes
2 glucose and certain enzymes but has no calcium
3 fructose and certain enzymes but poor in calcium
4 fructose, calcium and certain enzymes.
Explanation:
(d) Seminal plasma is secreted from male accessory glands & it is rich in fructose, calcium and certain enzymes.
NCERT Page-44 / N-28
Human Reproduction(NCERT)
286452
Semen is a constituent of seminal plasma with
1 ovum
2 sperm
3 zygote
4 follicle
Explanation:
(b) Semen, or seminal fluid, is an alkaline fluid that contains spermatozoa embedded in seminal plasma. Semen is ejaculated by male reproductive system during orgasm.
(d) A spermatogonium divides into two primary spermatocytes. Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis-I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286449
The figure given below shows the sectional view of seminiferous tubule.
Which marked structure (A to $D$ ) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
1 A
2 B
3 C
4 D
Explanation:
(b) ' $B$ ' are the secondary spermatocytes which further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286450
The figure given below shows the structure of sperm. Identify the correct feature corresponding to the marked structure A, B, C and D.
1 A - plasma membrane, B - tail, C - Acrosome, $D$ - Neck, $E$ - middle piece and $F$ - Mitochondria.
2 A-middle piece, B - plasma membrane, C-Neck, $D$ - Mitochondria, $E$ - tail and $F$ - Acrosome.
3 A - Mitochondria, B - tail, C - Neck, D - plasma membrane, $\text{E}$ - Acrosome and $\text{F}$ - middle piece.
4 A-Acrosome, B - middle piece, C - mitochondria, D - tail, $E$ - plasma membrane and F - Neck.
Explanation:
(a) In the given figure, $A,B,C,D,E$ and $F$ are marked as plasma membrane, tail, acrosome, neck, middle piece and mitochondria.
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286451
Seminal plasma in humans is rich in
1 fructose and calcium but no enzymes
2 glucose and certain enzymes but has no calcium
3 fructose and certain enzymes but poor in calcium
4 fructose, calcium and certain enzymes.
Explanation:
(d) Seminal plasma is secreted from male accessory glands & it is rich in fructose, calcium and certain enzymes.
NCERT Page-44 / N-28
Human Reproduction(NCERT)
286452
Semen is a constituent of seminal plasma with
1 ovum
2 sperm
3 zygote
4 follicle
Explanation:
(b) Semen, or seminal fluid, is an alkaline fluid that contains spermatozoa embedded in seminal plasma. Semen is ejaculated by male reproductive system during orgasm.
(d) A spermatogonium divides into two primary spermatocytes. Each primary spermatocyte duplicates its DNA and subsequently undergoes meiosis-I to produce two haploid secondary spermatocytes. Each of the two secondary spermatocytes further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286449
The figure given below shows the sectional view of seminiferous tubule.
Which marked structure (A to $D$ ) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
1 A
2 B
3 C
4 D
Explanation:
(b) ' $B$ ' are the secondary spermatocytes which further undergoes meiosis II to produce two haploid spermatids.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286450
The figure given below shows the structure of sperm. Identify the correct feature corresponding to the marked structure A, B, C and D.
1 A - plasma membrane, B - tail, C - Acrosome, $D$ - Neck, $E$ - middle piece and $F$ - Mitochondria.
2 A-middle piece, B - plasma membrane, C-Neck, $D$ - Mitochondria, $E$ - tail and $F$ - Acrosome.
3 A - Mitochondria, B - tail, C - Neck, D - plasma membrane, $\text{E}$ - Acrosome and $\text{F}$ - middle piece.
4 A-Acrosome, B - middle piece, C - mitochondria, D - tail, $E$ - plasma membrane and F - Neck.
Explanation:
(a) In the given figure, $A,B,C,D,E$ and $F$ are marked as plasma membrane, tail, acrosome, neck, middle piece and mitochondria.
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286451
Seminal plasma in humans is rich in
1 fructose and calcium but no enzymes
2 glucose and certain enzymes but has no calcium
3 fructose and certain enzymes but poor in calcium
4 fructose, calcium and certain enzymes.
Explanation:
(d) Seminal plasma is secreted from male accessory glands & it is rich in fructose, calcium and certain enzymes.
NCERT Page-44 / N-28
Human Reproduction(NCERT)
286452
Semen is a constituent of seminal plasma with
1 ovum
2 sperm
3 zygote
4 follicle
Explanation:
(b) Semen, or seminal fluid, is an alkaline fluid that contains spermatozoa embedded in seminal plasma. Semen is ejaculated by male reproductive system during orgasm.