Often under genetic control. Leaf number in cereals may be indeterminate, yet anther number is determinant. Cell or organ changes toward greater degrees of complexity. Specialization of general cells, tissues, or organs to specific function. A process of development toward a complex state.
Organs initiate at the meristem as undifferentiated cells but differentiate toward a mature state.
Point farthest or further from the origin of an organ. The fertilization process in angiosperms resulting in fusion of pollen nuclei with both zygote and the polar bodies to form the 2N embryo and the 3N endosperm. The triploid tissue formed by fusion of pollen nuclei and the polar bodies. Nutritive tissue to supply developing embryo. The external cell layer of plants that forms the boundary of the plant with the environment.