Which group possesses vessels in its xylem ?
(a) Pteridophytes
(b) Angiosperms
(c) Gymnosperms
(d) Both a and b

Options

A. Pteridophytes
B. Angiosperms
C. Gymnosperms
D. Both 1 and 2

Answer

To determine which group possesses vessels in its xylem, let's analyze the options provided:

1. **Understanding Xylem**: Xylem is a type of tissue in vascular plants responsible for the transport of water and nutrients from the roots to the rest of the plant. It consists of various cell types, including tracheids and vessels.

2. **Analyzing the Options**:
- **(a) Pteridophytes**: These are seedless vascular plants (like ferns) that primarily contain tracheids for water conduction. They do not have vessels in their xylem.
- **(b) Angiosperms**: This group includes flowering plants. Angiosperms are characterized by the presence of vessels in their xylem, which are efficient for water transport due to their structure, including perforations that allow for easier flow of water.
- **(c) Gymnosperms**: These are seed-producing plants that do not form flowers or fruits. Gymnosperms primarily have tracheids and lack vessels in their xylem.
- **(d) Both a and b**: This option suggests that both Pteridophytes and Angiosperms possess vessels in their xylem, which is incorrect since Pteridophytes do not have vessels.

3. **Conclusion**: Based on the analysis, the only group that possesses vessels in its xylem is **(b) Angiosperms**.

**Final Answer**: (b) Angiosperms

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