Question

A characteristics of castor seed is the presence of caruncle which develops from
A. Peduncle
B. Integument
C. Micropyle
D. Third integument.

Answer 1

Castor plant or Ricininae communisis a perennial plant. It belongs to the family Euphorbiaceae, subfamily Acalyphoideae. Castor plant seeds are known as castor beans. Castor bean involves 40-60% oil that comprises a high amount of triglycerides, ricin. Ricin is a toxin that is soluble in the water.

Complete answer: Castor plant possesses a fleshy structure that is found in attachment with the seeds is called the caruncle. The caruncle is the name of the elaiosome. It is the outgrowth projections that comprise the outer layer of the micropylar. Caruncle involves the dispersal of the seeds of the plant. Caruncle involves high lipid and protein molecules. Peduncle forms the caruncle. The peduncle is a stem-like structure whose main function is to provide support.
The layer that is found at the upper surface of the plant and animals is known as integument. Integument in a plant comprises either one layer or two layers. The layers are named unitegmic and bitegmic respectively. It is responsible for protecting the organism from the environment.
On the surface of the ovule, a small pore is found by which penetration of a pollen tube occurs. It is called the micropyle. It is involved in the seed processing of the plant.
The third integument is also known as ariel. Some seeds of specific plants comprise an outer growth that involves enclosing the seed. This outer growth is known as aril or third integument.
So, the correct answer is “Option A”.

Note: In Castor, seeds caruncle involves the absorption of water. This stored water is used by the seed when germination takes place under a favourable condition. Castor seed comprises the outer coating which can cause diarrhea, nausea, liver damage, kidney damage, vomiting, shock, etc.