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.

where is the scientific experiment?

maybe because its impossible for balloons to lift a whole entire house.