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: -The vascular cambium and cork cambium are secondary meristems that are formed in stems and roots after the tissues of the primary plant body have differentiated. The vascular cambium is responsible for increasing the diameter of stems and roots and for forming woody tissue. The cork cambium produces some of the bark.

Detailed explanation-3: -Meristems contribute to both primary (taller/longer) and secondary (wider) growth. Primary growth is controlled by root apical meristems or shoot apical meristems, while secondary growth is controlled by the two lateral meristems, called the vascular cambium and the cork cambium.

Detailed explanation-4: -Meristems are the tissues that play a vital role in the growth of plants horizontally and vertically. Complete answer: The meristem is a type of tissue found in plants. It consists of undifferentiated cells capable of cell division.

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.