essays for biology Flashcards
essay on fertilization and pollination
Pollination alone does not usually result in the formation of fruits and seeds. Ovules begin developing into seeds only after a sperm cell brought by a pollen grain fuses with the egg cell within the ovule through the process of fertilization. Fertilization ensures that the characteristics of the new plant that grows from the seed are determined by its parents. In other words, the new plant receives a “blueprint” for growth from the sperm cell and egg cell that unite to form it. The sperm cell and egg cell are called gametes, or reproductive cells. Reproduction in which sperm and egg unite is sexual reproduction.
essay on propagation
-When a person uses vegetative reproductive
methods to start a new plant from a root, stem, or leaf, the process is called vegetative propagation
-There are several types of vegetative propagation, including the use of cuttings or slips, layering, grafting, budding, and tissue culturing.
- Roots that sprout from the bottom of a cut stem are examples of adventitious roots, roots that grow from an unexpected region of the plant, such as from a stem or leaf.
