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2.Human Reproduction
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The placental barrier between the maternal and foetal blood is minimum in
A
Goat
B
Pig
C
Cow
D
Human
(AIIMS-1992)
Solution
(d) Maximum number of barriers present in some mammals is six, but in human beings only three barriers are present.
Standard 12
Biology
Similar Questions
Match the columns.
Column $I$ | Column $II$ |
$(a)$ Testis andovary | $(1)$ Part of reproductive organ that transport germ cells |
$(b)$ Clitoris |
$(2)$ Developing fleshy fold surrounding both side of urinegenital groove – urethra |
$(c)$ Oviduct | $(3)$ Gametes which produce germ cells |
$(d)$ Scrotum,labium | $(4)$ Organs associated majora with sexual respons |
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