Which of the following divisions of plants does NOT have a well differentiated body?

Thallophyta

The correct answer is Option (3)- Thallophyta

Thallophyta is the division of plants that does NOT have a well-differentiated body.

Explanation:

1. Pteridophyta: These are vascular plants, including ferns, which have well-differentiated roots, stems, and leaves.
2. Gymnosperms: Gymnosperms, like conifers, have a well-differentiated structure with distinct roots, stems, and leaves.
3. Thallophyta: Thallophyta, such as algae and fungi, lack the typical differentiation into roots, stems, and leaves. They have a simple, undifferentiated body called a thallus.
4. Bryophyta: Bryophytes, like mosses, have simple structures but do exhibit some differentiation into specialized tissues like rhizoids, stems, and leaves. However, these structures are less complex than those in Pteridophyta and Gymnosperms.