Consider the following statements and choose the correct option. 1. The thread-like cytoplasmic strands, running from one cell to other is known as plasmodesmata. 2. Xylem and phloem constitute the vascular bundle of the stem. 3. The first formed xylem elements are described as metaxylem. 4. Radial vascular bundles are mainly found in the leaves.

Step-by-step solution

Plasmodesmata are thread-like cytoplasmic strands running from one cell to other and these make connections between adjacent cells. Each vascular bundle is made up necessarily of xylem and phloem elements and the cambium may or may not be present. The first differentiated xylem is called protoxylem, whereas those differentiated afterward are called metaxylem. Radial vascular bundles are mainly found in the roots. In these, there are separate and alternate strands of phloem and xylem present on different radii.