Which structure is responsible for primary and secondary growth in plants?

a) petiole
b) meristem
c) xylem
d) mesophyll

meristems

Explanation:

Apical meristems, that are located at the tips of the roots and shoots, are responsible for primary growth. Secondary growth allows for the plant to grow into thickness. Lateral meristems known as the vascular cambium and cork cambium are responsible for secondary growth.

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affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.