It can refer to a stage in the development of certain species of invertebrates, or it can refer to a growth in the tissues of organs. The interphase prepares the cell for the subsequent phases in cell division such as mitosis and cytokinesis. Usually denoted by a number from Stage 1 (least severe) to Stage 4 (more advanced). The chromosomes then duplicate and contract into paired chromatids. See more. At pachytene they pair, the corresponding portions of the two chromosomes lying side by side. How to use stage in a sentence. "The concept is closely related to those of the life history, development and ontogeny, but differs from them in stressing renewal." At this stage the pair of chromosomes is known as a tetrad,… Biology is brought to you with support from the Amgen Foundation. Stage definition is - one of a series of positions or stations one above the other : step. Stage IV means the cancer has spread to other parts of your body. Our mission is to provide a free, world-class education to anyone, anywhere. Parturition Definition in Biology. Polyp Definition. Define microscope stage. stage (Science: oncology) The extent to which cancer has spread from its original site to other parts of the body. Strictly applied, the term is used to describe the duplication and distribution of chromosomes, the structures that carry the genetic information. This is the currently selected item. In biology, polyp is a term with several meanings. ... English dictionary definition of microscope stage. Like many biological processes, the process of labor and delivery is divided into stages. Other articles where Leptotene stage is discussed: heredity: During meiosis: At the leptotene stage the chromosomes appear as long, thin threads. Both are described below. Stage II and III mean the cancer is larger and has grown into nearby tissues or lymph nodes. Biology is brought to you with support from the. Since interphase is a preparation phase for the cell division processes, it enables the cell to grow, synthesizing organelles that allow the cell to function adequately ones it matures. Telophase definition, the final stage of meiosis or mitosis, in which the separated chromosomes reach the opposite poles of the dividing cell and the nuclei of the daughter cells form around the two sets of chromosomes. It is also called the phase between labor to childbirth or delivery. It is the process of giving birth to a child, and the placenta from the uterus to the vagina is called parturition. Labor and Parturition. Stages of translation. The labor or childbirth process is called parturition, which … Protein targeting. In biology, a biological life cycle (or just life cycle or lifecycle when the biological context is clear) is a series of changes in form that an organism undergoes, returning to the starting state. 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