8. a) Observe the following dichotomy of characters and prepare (a) a bracketed key and (b) an indented key. Stem pubescent; Leaves obovate Taxon A Petals connate Stem glabrous; Leaves ovate; petals distinct B Leaf margin serrate; sessile; petals rounded C Petals-4, Leaf base cordate D Petals-5, Leaf base...