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Biology · 2023 · 3 marks
CBSE 2023 · Region 1 · Set 1 · Q28
(a) (i) Expand the abbreviations given below, used for different modes of assisted reproductive technologies: (1) ZIFT (2) ICSI (3) IUT (4) GIFT (ii)…
(a)(i)
Expand the abbreviations given below, used for different modes of assisted reproductive technologies :
(1)
ZIFT
(2)
ICSI
(3)
IUT
(4)
GIFT
(ii)
Which one of them cannot be considered as a procedure of IVF ? Give reasons in support of your answer.
OR
(b)
Differentiate between the following :
(i)
Perisperm and Pericarp
(ii)
Syncarpous pistil and Apocarpous pistil
(iii)
Plumule and Radicle
Marking-scheme solution
(a) (i) ($\displaystyle 1$) ZIFT : Zygote intrafallopian transfer.
(2) ICSI : Intracytoplasmic sperm injection.
(3) IUT : Intra uterine transfer.
(4) GIFT : Gamete intrafallopian transfer.
(ii) GIFT; GIFT allows the eggs to fertilize and develop in the fallopian tube / IVF places a directly fertilized egg (zygote) into the uterus / in vivo fertilisation is involved in GIFT.
(b) (i) Perisperm : Persistent nucellus in some seeds. Pericarp : The wall of ovary develops into wall of fruit.
(ii) Syncarpous : fused pistils. Apocarpous : free pistils.
(iii) Plumule : Future stem / terminal part of epicotyl / shoot tip of embryonal axis. Radicle : Future root / terminal part of hypocotyl / root tip of embryonal axis.
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.