Q. No.
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
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
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
Assertion : Embryonic development proves interrelationship and common ancestory of metazoans.
Reason : It involves similar sequence of five dynamic processes during development.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion : There is generally monospermy in most of animals.
Reason : Vitelline membrane of ovum checks polyspermy.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion : Cleavage is also called fractionating process.
Reason : In cleavage, number of blastomeres increases but size of blastomears decreases.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion : Nuclear-cytoplasmic ratio decreases in cleavage.
Reason : During cleavage, cytoplasmic synthesis is faster than DNA synthesis.
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