Chorion in terrestrial vertebrate embryos:

1. prevents desiccation of the embryo
2. helps in the exchange of oxygen and carbon dioxide with the environment
3. perform excretory functions
4. acts as a shock absorber

Subtopic:  Embryonic Development till Gastrulation | Fetal Development & Parturition |

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In humans, the majority of the placenta is formed by:
1. allantois
2. amnion
3. chorion
4. yolk sac

Subtopic:  Fetal Development & Parturition |
 52%

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The functions of the placenta include:

I: Acts as an excretory organ.
II: Acts as a respiratory organ.
III: Acts as an endocrine organ.
 
1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
Subtopic:  Fetal Development & Parturition |
 74%
From NCERT

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Human bones develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm

Subtopic:  Fetal Development & Parturition |
 52%

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Human lungs develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm

Subtopic:  Fetal Development & Parturition |

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During cleavage divisions, successive blastomeres:

1. have a decreasing nuclear/cytoplasmic ratio

2. become smaller and smaller

3. grow larger and larger

4. undergo meiotic divisions.

Subtopic:  Embryonic Development till Gastrulation |

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Human nervous system is derived from embryonic:

1. ectoderm

2. endoderm

3. epiderm

4. mesoderm

Subtopic:  Embryonic Development till Gastrulation | Fetal Development & Parturition |
 54%

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Gonadotropin releasing hormone (GnRH) is released from:

1. anterior pituitary

2. hypothalamus

3. gonads

4. posterior pituitary

Subtopic:  Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
 64%
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Inhibin in males or females decrease the secretion of:

1. FSH

2. LH

3. GnRH

4. Sex steroids

Subtopic:  Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |

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Identify the correct statement regarding the onset of puberty amongst the following:

1. LH is the first hormone to demonstrate an increased secretion

2. GnRH secretion decreases

3. spermatogenesis in males in stopped

4. secretion of sex steroids decreases

Subtopic:  Seminiferous Tubules & Spermatogenesis |
 82%

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