Secondary growth in stems is usually seen in
monocots
dicots
both monocots and dicots
neither monocots nor dicots

dicots

Explanation:

The stem is a thin stem that has no secondary growth in monocotyledons. It occurs, for example, in grasses. When the stem plant has secondary growth, this plant is usually a dicotyledonea. In addition to the stem, the plants have other structures such as trunk, stalk, strain and stem.

The trunk is a stem thickened by secondary growth and is typical of most trees. Stolen is a stem that grows close to the ground, as is the case with strawberries. The stem is a cylindrical stem without branches, typical of palm trees. The stem is also a branchless stem, but it has nodes distributed along its length. An example is the bamboo stem.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).