Question

Intercalary meristem produces
a. Secondary growth
b. Primary growth
c. Apical growth
d. Secondary thickening

Answer 1

The type of meristematic tissue associated with the growth in length in the middle position is called intercalary meristem. To be specific, it is made up of meristematic cells that divide mitotically in the stem at the base of nodes and leaf blades. The growth at this point is known as intercalary growth.

Complete answer:
Primary growth is carried out by the Intercalary meristem. Intercalary meristems have the capability of cell division and they permit plants for rapid growth. It is present at the nodes of bamboo allowing it for rapid stem elongation while those at the base of most grass leaf blades allow damaged leaves to grow again rapidly. This leaf regrowth in grasses produces in response to harm by grazing herbivores but is more close to us in response to the lawnmowers.

Secondary growth is identified by an increase in thickness or girth of the plant. It is caused by cell growth and division in the lateral meristem.

Shoot apical meristem (SAM), which gives rise to organs present at the tips of the plant like the leaves and flowers.

Secondary thickening is the formation of new tissue by the repeated lateral division of cells in the cambium of a woody plant.

Hence, the correct answer is option (B).

Note: The intercalary meristems are localized at the internodes or the base of the leaves. The intercalary meristems help in expanding the length of the internode. The cells of this tissue are very active, it contains dense cytoplasm, thin cellulose walls, and prominent large nuclei. They lack vacuoles. The lateral meristems are always located on the lateral side of the stem and root of a plant.