Question

What causes some plants to have fleshy herbaceous stem?

• A. Because they have too much leaves
• B. Because they lack secondary growth
• C. Due to too much primary growth
• D. They do not produce lignin to harden the stem

Answer 1

The correct option is B

Because they lack secondary growth

Stems of angiosperms can undergo two types of growth - primary and secondary. While primary growth increases the length, the secondary growth increases the girth of the stem and this leads directly to the hardening of the stem. Stems that do not show secondary growth, like monoct stems tend to remain herbaceous.