Identify the characters of corn, castor, coconut respectively.

Options

A. Caryopsis fruit, Aggregate fruit, Drupe fruit
B. Non endospermic seed, Schizocarpic fruit, Endospermic seed
C. 2n = 20 in meiocyte, Endospermic seed, Largest seed
D. Embryo with scutellum, schizocarpic fruit, Endosperm is the chief edible part.

Answer

To identify the characters of corn, castor, and coconut, we can break down the characteristics of each plant systematically.

### Step-by-Step Solution:

1. **Corn (Zea mays)**:
- **Type**: Monocotyledon (monocot)
- **Seed Structure**: Contains a single cotyledon.
- **Scutellum**: The seed is attached to a structure called the scutellum, which provides nutrients to the growing embryo.
- **Indehiscent**: The seed does not split open upon maturation, meaning it retains its structure.

2. **Castor (Ricinus communis)**:
- **Type**: Dry fruit known as a syzocarpic fruit.
- **Seed Structure**: It is characterized by a single seed that is released when the fruit matures.
- **Indehiscent**: The fruit does not crack open to release the seed; it remains intact.
- **Medicarp**: This is a unique feature of castor, indicating a specific type of dry fruit.

3. **Coconut (Cocos nucifera)**:
- **Type**: Known as a drupe (or droop fruit).
- **Pericarp Structure**: The outer part is hard and stony, while the inner part (endocarp) is soft and edible.
- **Endosperm**: The edible part of the coconut is primarily the endosperm, which is soft and provides nourishment.

### Summary of Characters:
- **Corn**: Monocot, single cotyledon, scutellum, indehiscent seed.
- **Castor**: Syzocarpic fruit, single seed, indehiscent, unique medicarp.
- **Coconut**: Drupe, hard outer pericarp, soft edible endosperm.