Question

Aim of the Experiment
To identify the different parts of an embryo of a dicot seed (pea, gram or red kidney beans).
Material​

Answer 1

Answer:

AIM  : To identify the different parts of an embryo of a dicot seed (pea, gram or red kidney bean).

MATERIALS REQUIRED  : Seeds of Bengal gram/red kidney bean, forceps, cloth, magnifying glass, Petridis, water.

OBSERVATIONS

• Bean seed is kidney-shaped with a concave and convex side.

• The concave side which is slightly darker has a scar called hilum.

• Adjacent to hilum a small pore known as micropyle is present.

• The seed is covered by a seed coat.

• The embryo consists of two large, white and kidney-shaped cotyledons.

• The cotyledons are attached laterally to the curved embryonal axis.

• Rod shaped and slightly bulgy lower end of embryonal axis which lies towards micropylar end is called radicle.

• Plumule is the upper end of embryonal axis.

• The part of embryo axis between radicle and attachment of cotyledon leaves is called hypocotyl.

• The part of embryo axis between plumule and attachment of cotyledon leaves is called epicotyl.

RESULT  :The embryo of dicot seeds consists of three main parts – plumule, radicle and two cotyledons.

PRECAUTIONS:

• The cloth which is used to cover seeds should be moist and should not get dry.

• Seeds should be open carefully so that the embryo does not get damaged.