AP BIOLOGY

Detailed explanation-1: -The secondary growth of plants increase in stem thickness and it is due to the activity of the lateral meristems, which are absent in herbs or herbaceous plants. There are two types of lateral tissues involved in secondary growth, namely, vascular cambium and cork cambium.

Detailed explanation-2: -Secondary growth is characterized by an increase in thickness or girth of the plant, and is caused by cell division in the lateral meristem.

Detailed explanation-3: -Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem. Herbaceous plants mostly undergo primary growth, with little secondary growth or increase in thickness.

Detailed explanation-4: -Secondary growth involves the thickening of the plant axis through the activity of lateral meristems. The end result of secondary growth is increased amounts of vascular tissue. As plants grow larger, more vascular tissue is needed for water conduction and the transport of nutrients.

Detailed explanation-5: -Cambium (lateral meristem) is situated below the bark and is responsible for the increase in the girth of the stem or root.