HARD
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A change in the amount of yolk and its distribution in the egg will not affect

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Important Questions on Human Reproduction

EASY
Biology>Reproduction>Human Reproduction>Implantation
The embryo with 8 to 16 blastomeres is called a:
HARD
Biology>Reproduction>Human Reproduction>Implantation
After which month of the embryo development in humans, the growth of the placenta slows down?
EASY
Biology>Reproduction>Human Reproduction>Implantation
Distinguish between the blastula and gastrula by giving two points.
EASY
Biology>Reproduction>Human Reproduction>Implantation
Explain "Gastrulation".
EASY
Biology>Reproduction>Human Reproduction>Implantation

Write the differences between blastula and morula.

EASY
Biology>Reproduction>Human Reproduction>Implantation
What is embryogenesis? Mention two important events that occur during embryogenesis.
EASY
Biology>Reproduction>Human Reproduction>Implantation
What is implantation?
MEDIUM
Biology>Reproduction>Human Reproduction>Implantation

Given below are statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Endometrium is necessary for implantation of blastocyst.

Reason R: In the absence of fertilization, the corpus luteum degenerates  that causes  disintegration of endometrium.

In the light of the above statements, choose the correct answer from the options given below:

EASY
Biology>Reproduction>Human Reproduction>Implantation
Explain the term Implantation.
MEDIUM
Biology>Reproduction>Human Reproduction>Implantation
What is called differentiation?
MEDIUM
Biology>Reproduction>Human Reproduction>Implantation
What will be effect on embryonic development if placenta does not formed after implantation. Explain.
HARD
Biology>Reproduction>Human Reproduction>Implantation
From an early amphibian embryo the cells that would give rise to skin in adults were transplanted into the developing brain region of another embryo. The transplanted cells developed into brain tissue in the recipient embryo. What do you infer from this experiment?
EASY
Biology>Reproduction>Human Reproduction>Implantation
Explain "Implantation".
EASY
Biology>Reproduction>Human Reproduction>Implantation
Human embryo is protected by which cavity?
MEDIUM
Biology>Reproduction>Human Reproduction>Implantation
What is quickening? In the human embryonic stage, which organs are formed during the third to sixth week of gestation?
EASY
Biology>Reproduction>Human Reproduction>Implantation
Several hormones like hCG, hPL, estrogen, progesterone are produced by
EASY
Biology>Reproduction>Human Reproduction>Implantation
The amnion of mammalian embryo is derived from
EASY
Biology>Reproduction>Human Reproduction>Implantation
Embryo after the first 8 weeks of development is called _____.
EASY
Biology>Reproduction>Human Reproduction>Implantation
In human beings, at the end of 12 weeks (first trimester) of pregnancy, the following is observed:
MEDIUM
Biology>Reproduction>Human Reproduction>Implantation
Morphogenetic movements take place predominantly during the following embryonic stage: