Urgent! Several biological problems

(1) The ovary is superior. There are two situations: one is that the receptacle is dome-shaped or flat-topped, and the bottom of the ovary is placed on the receptacle, which is higher than other parts of the flower. The calyx, corolla and stamen are attached to the receptacle under the pistil, which is called the upper and lower flowers of the ovary. Such as peony and broad bean. The other is to recess the container into a cup or pot shape. Although the ovary is still attached to the receptacle at the base, all parts of the flower surround the ovary, which is called the upper position of the ovary. Such as peaches and roses.

(2) The ovary is semi-inferior. The lower part of the ovary heals with the receptacle, and the calyx, corolla and stamen are attached to the higher position of the receptacle around the ovary, which is called semi-inferior ovary and periphyton. Like a peaceful flower.

(3) low ovaries. Receptacle and ovary wall are completely or almost completely healed, and ovary is in the lowest position. Calyx, corolla or stamen group contact the upper receptacle edge of ovary, which is called the lower flower and upper flower of ovary. Like a melon.

The so-called false diaphragm is the diaphragm formed by the placenta tissue rather than the ovarian wall ~ For example, the pod is divided into two cavities by the false diaphragm ~