Solution

(a)
Racemose inflorescence Cymose inflorescence
Younger flowers are present at the tip while older flowers are arranged at the base of this inflorescence. Such an arrangement is called acropetal succession. Younger flowers are present at the base of the inflorescence, while older flowers are present at the top. Such an arrangement is called basipetal succession.
The main axis in racemose inflorescence continues to grow and produce flowers laterally. The main axis in cymose inflorescence has limited growth, which later terminates into a flower.
(b)
Fibrous root Adventitious root
In monocots, the primary root which develops from the radicle of the seed is short-lived and is replaced by a large number of roots arising from the base of the stem. These roots arise from any part of the plant other than the radicle of seeds.
It is found in wheat and other cereals. It is found in banyan, Monstera, and other plants.
(c)
Apocarpous ovary Syncarpous ovary
The flowers with apocarpous ovary have more than one carpel. These carpels are free. The flowers with syncarpous ovary have more than one carpel. However, these carpels are fused
It is found in lotus and rose flowers. It is found in the flowers of tomato and mustard.