Let me explain the structure of a dicot seed and how to identify and label the radicle.

What is a Dicot Seed?

Dicot seeds come from dicotyledonous plants, which are plants with two seed leaves (cotyledons). Examples include beans, grams, and peanuts. A typical dicot seed has several parts, each with a specific function.

Parts of a Dicot Seed (using a bean seed as an example):

Seed Coat: The outer protective covering.
Hilum: A scar where the seed was attached to the fruit.
Micropyle: A small pore for water absorption.
Cotyledons: Two large, fleshy structures that store food.
Embryo: The young plant inside the seed, consisting of:
- Plumule: The future shoot.
- Radicle: The future root.
- Embryonic Axis: Connects plumule and radicle.

Identifying the Radicle:

The radicle is the part of the embryo that develops into the root. In a dicot seed like a bean, it is located at one end of the embryonic axis, opposite the plumule. It is often pointed and is situated near the micropyle.

Steps to Draw and Label:

Step 1: Draw an oval shape to represent the seed.

Step 2: Outline the seed coat as the outer boundary.

Step 3: Draw two large cotyledons inside.

Step 4: Between the cotyledons, draw a small structure with two parts: the plumule (at one end) and the radicle (at the other end). The radicle is usually the more pointed end.

Step 5: Label the radicle clearly, pointing to the embryonic root part.

Note: Since I can't generate images, ensure your diagram shows the internal structure when the seed is split open, highlighting the radicle's position.

Related Topics:

Seed Germination: The radicle is the first part to emerge during germination, growing downward to form the root system.

Monocot vs. Dicot Seeds: Monocot seeds (e.g., maize) have only one cotyledon and different embryo structure.

Embryo Development: Understanding how the embryo forms in plants.

Key Formulae/Theory:

No formulae, but important concepts:

Dicot seeds have two cotyledons.
The radicle gives rise to the primary root.
Seed structure is adapted for protection and nourishment of the embryo.