Which element of the angiosperm is long, tube like and associated with the companion cell ?

Options

A. Sieve cell
B. Sieve tube element
C. Tracheid
D. Vessel element

Answer

**Step-by-Step Solution:**

1. **Identify the Elements of Angiosperms**: In angiosperms, there are various elements that make up the vascular tissue, specifically the phloem. The main components include sieve tube elements, companion cells, phloem parenchyma, and phloem fibers.

2. **Focus on the Characteristics of Sieve Tube Elements**: The question specifically asks for a long, tube-like element. Among the phloem components, the sieve tube elements are known for their elongated, tubular structure.

3. **Understand the Association with Companion Cells**: Companion cells are closely associated with sieve tube elements. They play a crucial role in the functioning of sieve tubes by providing metabolic support since sieve tubes lack a nucleus.

4. **Conclusion**: Given that the sieve tube elements are long, tube-like structures and are associated with companion cells, the correct answer to the question is the "sieve tube elements."

**Final Answer**: The element of the angiosperm that is long, tube-like, and associated with the companion cell is the **sieve tube element**.

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