Question

Opening of flower in the cymose inflorescence is
(a) Acropetal
(b) Centrifugal
(c) Basipetal
(d) Centripetal

Answer 1

Hint: The cluster of a flower borne on the floral axis is called an inflorescence. Different types of inflorescence depend upon the mode of branching of the peduncle, inflorescence attracts a large number of insects therefore chances of pollination are high.

Complete Answer:
In the cymose peduncle, growth is definite which results in the formation of flowers at the tip of the main axis. After the formation of the flower at the main axis lateral branches started to eject out which also behave as the main axis and the tip of the branch also terminates into the flower. This type of flower arrangement is basipetal and centrifugal.

Additional information: On the basis of the arrangement of the peduncle, the inflorescence is also classified as racemose, mixed, and specialized.
The racemose inflorescence has an unbranched peduncle with a flower at the tip of the axis. It bears flowers in acropetal order. In the case the peduncle gets reduced, the flower will be borne in a centripetal manner. The racemose inflorescence is of two types: simple and compound.
In mixed inflorescence mode of arrangement of branching are two or more distinct types. Oats, rice, and ageratum show mixed inflorescence.
The special inflorescence is highly modified and densely crowded. There are four types of special inflorescence present like hypanthium in which the main axis foam cup with a small opening. Internally they bear small sessile flower, cyathium in which a membranous envelope with nectar gland bear central pedicellate female flower and verticillaster in which peduncle oppositely bears bracts with condensed axil, due to condensed axil flower appear in axillary clusters.
So, the correct answer is ‘Basipetal and Centrifugal’.

Note: Solitary flowers are not considered as inflorescence because they occur singly. A solitary flower at the tip of the axis is considered a solitary terminal while a flower at the branch is considered a solitary axillary.