Question

Which of the meristem is responsible for secondary growth?
A. Apical
B. Lateral
C. Intercalary
D. Basal

Answer 1

Plants have various tissues that assist with growth and development and meet different needs. Meristems are tissues that play a key role in the horizontal and vertical growth of plants. Secondary growth refers to growth arising from cell division in the cambia or lateral meristems that causes thickening of the stems and roots.

Complete answer: Meristem is a type of tissue discovered in plants. It consists of cells that are undifferentiated and able for cell division. Lateral meristems are the form of meristems recognized as the cambium and cork cambium are organized parallel to the sides of an organ and only divide periclinal or radially and are responsible for girth or diameter raise and thus cause secondary development. Two other types of meristems present are responsible for a tree's primary growth. These are:
a. Apical (at the tips)- The apical meristem is the growth area of plants located within the root tips and the tips of the new shoots and leaves. These are apical (at the tips). For vertical development, the apical meristem is liable.
b. Intercalary meristem (in the middle)-Intercalary meristem is a form of meristematic tissue compatible with mid-position growth in length, referring to intercalary growth at this stage. In the stem, at the base of nodes and leaf blades, it splits mitotically.
Hence the correct answer is B-Lateral.

Note: The vascular cambium and hence the cork cambium are secondary, or lateral, meristems, which are found entirely in woody plants and some herbaceous ones. They develop secondary tissues in the stems and roots from a hoop of the vascular cambium. Also, lateral meristems are categorized into two kinds: vascular cambium, which leads to secondary xylem and secondary phloem formation.