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Science · 2022 · 2 marks
CBSE 2022 · Region 2 · Set 1 · Q3
Give reasons: (i) Placenta is extremely essential for foetal development. (ii) Uterine lining becomes thick and spongy after fertilisation.
Give reasons :
(i)
Placenta is extremely essential for foetal development.
(ii)
Uterine lining becomes thick and spongy after fertilisation.
Marking-scheme solution
(i) Placenta is extremely essential because it
provides nutrients /glucose / oxygen to the growing embryo.
removes waste generated by embryo by transferring them into mother's blood through it.
(ii) Uterine lining becomes thick and spongy which is required to provide nourishment to the fertilised egg (embryo).
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CBSE Class 10 Science past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.