STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

$(a)$ Numbers                $(b)$ Biomass

$(c)$ Pug makers            $(d)$ Height

$I$. In the absence of adenosine deaminase enzyme, purine metabolism is disturbed and $T-$lymphocytes fails to function $II$. $ADA$ deficiency is caused by the deletion of the gene for $ADA$

$III$. In some cases, it can be cured by bone marrow transplantation and enzyme replacement therapy. But in both approaches, the patients are not completely cured

$IV$. For permanent cure, genes isolated from the bone marrow cells producing $ADA$ at early embryonic stages can be a possible cure

Which of the above statements are correct?

$(A)$ Wings of butterfly and birds look alike andare the results of ___$(i)$___ evolution.

$(B)$ Miller showed that $CH_4 , H_2 , NH_3$ and ___$(i)$___ when exposed to electric discharge in a flaskresulted in formation of ___$(ii)$___ .

$(C)$ Vermiform appendix is a ___$(i)$___ organ and an ___$(ii)$___ evidence of evolution.

$(D)$ According to Darwin evolution took placedue to ___$(i)$___ and ___$(ii)$___ of the fittest.