MCQ
Karyotaxonomy is the modern branch of classification which is based on
- ANumber of chromosomes
- ✓Bands found on chromosomes
- COrganic evolution
- DTrinomial nomenclature
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$I$. Picric acid $II$. $O AA$
$III$. Malic acid $IV$. Aspartic acid
Select the correct option
Column $-I$ Column $-II$
$(a)$ $6-15$ pairs of gill slits $(i)$ Trygon
$(b)$ Heterocercal caudal fin $(ii)$ Cyclostomes
$(c)$ Air Bladder $(iii)$ Chondrichthyes
$(d)$ Poison sting $(iv)$ Osteichthyes
$R$ : Sapwood contains actively conducting vessels and occupies central part of stem.