Among the following stem cells, which are found in the umblical cord?
(1) Embryonic stem cells

(2) Adult stem cells

(3) Cord blood stem cells

(4) All of the above 

Subtopic:  Embryonic Development till Gastrulation |
AIIMS - 2009
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which of the following hormones is secreted by implanted blastocyst, that acts on the corpus luteum in the ovary, stimulating the body to produce estrogens and progesterone to maintain the uterine lining?
(1) Estrogen 

(2) HCG

(3) Progesterone

(4) Oxytocin

Subtopic:  Implantation : Part 2 | Implantation |
 64%
AIIMS - 2009
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NEET 2023 - Target Batch - Aryan Raj Singh
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From which of the embryological germ layers is the epithelial tissue derived

(I) ectoderm

(II) mesoderm

(III) endoderm

(1) I & II are correct

(2) I & III are correct

(3) II & III are correct

(4) I & II & III are correct

Subtopic:  Embryonic Development till Gastrulation |
 56%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       Embryonic development proves interrelationship and common ancestory of metazoans.

Reason      :       It involves similar sequence of five dynamic processes during development.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Embryonic Development till Gastrulation |
 62%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       There is generally monospermy in most of animals.

Reason      :       Vitelline membrane of ovum checks polyspermy.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Fertilization: Part 2 | Fertilization |
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       Penetration of sperm into ovum is a chemical process.

Reason      :       Acrosome of sperm secretes a lytic enzyme hyaluronidase which dissolves vitelline membrane of ovum.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
 70%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion :     Cleavage is also called fractionating process.

Reason    :     In cleavage, number of blastomeres increases but size of blastomears decreases.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Implantation : Part 1 | Implantation : Part 2 | Implantation |
 62%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       Nuclear-cytoplasmic ratio decreases in cleavage.

Reason      :       During cleavage, cytoplasmic synthesis is faster than DNA synthesis.

Subtopic:  Embryonic Development till Gastrulation |
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       Implantation is the process of attachment of blastocyst on uterine endometrium.

Reason      :       Implantation is controlled by trophoblast and occurs by decidual cell reaction.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 51%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion   :       Gastrular movements are morphogenetic.

Reason      :       During gastrulation, cells move in masses and towards definite direction.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 65%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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