पौधों में द्वितीयक वृद्धि के लिए निम्नलिखित में से कौन सा ऊतक उत्तरदायी होता है?

Leaves characterized by parallel venation are a distinctive feature of:

The primary increase in length of stems and roots in plants is due to which of the following tissues?

Match Column I with Column II Column IColumn IIa. Tracheids1. Living, food conductionb. Sieve tubes2. Dead, water conductionc. Companion cells3. Associated with sieve tubesd. Xylem fibres4. Mechanical support