Differentiate between (a) Racemose and cymose inflorescence (b) Fibrous roots and adventitious roots (c) Apocarpous and syncarpous ovary | NCERT solution | Class 12 Biology | Unit-5 Morphology of Flowering Plants Biology

Q.6:- Differentiate between
(a) Racemose and cymose inflorescence
(b) Fibrous roots and adventitious roots
(c) Apocarpous and syncarpous ovary

 

Answer

(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.

→ The main axis in racemose inflorescence continues to grow and produce flowers laterally.

→ 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 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.

→ It is found in wheat and other cereals.

→ These roots arise from any part of the plant other than the radicle of seeds.

→ It is found in banyan,Monstera, and other plants.

(c)

Apocarpous ovary
Syncarpous ovary
→ The flowers with apocarpus ovary have more than one carpel. These carpels are free.

→ It is found in lotus and rose flowers.

→ The flowers with syncarpous ovary have more than one carpel. However, these carpels are fused.

→ It is found in the flowers of tomato and mustard.