Explanation
Nerium
Multiparous or Polychasial Cyme: In this type of cymose inflorescence the main axis culminates in the flower. The whole inflorescence looks like the umbel but is readily distinguished by the opening of the middle flower first, for example, Calotropis Procera. Jasmine is biparous cyme. Solanum nigrum is a sympodial cyme and Heliotropium is the scorpioid cyme.
Thus the correct option is D.
The racemose inflorescence is an indeterminate inflorescence. It shows indefinite growth and bears a number of flowers.
Cymose Head i.e. Glomerule is the Sessile or subsessile flowers. For example Anthocephalus cadamba, Albizia and Acacia.
Racemose Head is inflorescence and is found in family Compositae, for example, Tagetes, Zinnia and Sunflower.
Corymb is an un-branched peduncle and it bears the pedicellate flowers in an acropetal fashion.
Thus the correct answer is the cymose head.
The correct option is B.
The inflorescence is the arrangement of flowers on the stem of the plant. It provides the chance of cross-pollination and also it makes flowers more conspicuous to attract insects. When an insect grazes through the flower to collect the nectar, pollen grains stick on the body from the anther. When the insect move to each flower, then it leaves the residue of pollen on the stigma and thus it triggers the process of pollination.
So the correct answer is ensuring cross-pollination.
The correct option is C.
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