Embryo Development Test

Embryo Development

This is online test 02 for CBSE class 12 Biology Human Reproduction (Embryo development).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Amniotic fluid is
  • A
    Helpful in organogenesis
  • B
    Used to provide movement of foetus
  • C
    Useful for studying chromosomal abnormalities of foetus
    Correct
  • D
    Necessary to provide nutrients to embryo
2
Haploid nucleus of sperms and a haploid ovum fuse together to form
  • A
    Haploid zygote
  • B
    Diploid zygote
    Correct
  • C
    Blastometers
  • D
    Second polar body
3
Mitotic division in zygote as it moves through the isthmus of oviduct is called
  • A
    Binary fission
  • B
    Trophoblast
  • C
    Cleavage
    Correct
  • D
    Multiple fission
4
Finger-like projections appear on the trophoblast after implantation is called
  • A
    Chronic villi
    Correct
  • B
    Placenta
  • C
    Hausturia
  • D
    Chorionic gonadotropin
5
Inner cell mass (embryo) contain certain cells that contain cells called stem cells which have potency to
  • A
    Give rise only vital organs
  • B
    Give rise reproductive organs
  • C
    Give rise hearts only
  • D
    Give rise all the tissues and organs
    Correct
6
Which of the following is formed first out of the following in growing foetus: hairs, limbs and digits, heart, eye lids.
  • A
    Heart
    Correct
  • B
    Limbs and digits
  • C
    Hairs on head
  • D
    Eye lids
7
Which of the following group of hormones are produced during pregnancy?
  • A
    Estrogens, hPL and relaxin
  • B
    hCG, estrogens and relaxin
  • C
    hCG, hPL and relaxin
    Correct
  • D
    Progestogenes, hPL and relaxin
8
Parturition occurs due to release of hormone oxytocin that cause
  • A
    Stronger uterine contraction
    Correct
  • B
    Shrinkage of uterus
  • C
    Release of estrogen hormone
  • D
    Expansion of birth canal
9
Statement I: During growth of embryo limbs and external genital organ is formed by the ends of 12 weeks. Statement II: The sex of the developing embryo can be determined using ultrosonography after 3 months of pregnancy.
  • A
    Both statements are incorrect
  • B
    Both statements are correct
    Correct
  • C
    Statement I is correct but statement II is incorrect
  • D
    Statement II is correct but statement I is incorrect
10
Assertion: Just after implantation, embryo (inner cell mass) differentiates into ectoderm, mesoderm and endoderm. Reason: These three layers give rise to all tissues and organs in adult human beings.
  • A
    Assertion is incorrect but reason is correct
  • B
    Assertion is correct but reason is incorrect
  • C
    Both assertion and reason are correct
    Correct
  • D
    Both assertion and reason are incorrect