What are substances that make the plant body erect?

The root system, which supports the plants and absorbs water and minerals, is usually underground. The organ systems of a typical plant are illustrated below. The shoot system of a plant consists of leaves, stems, flowers, and fruits. The root system anchors the plant while absorbing water and minerals from the soil.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

true is the answer : )