Cell Division Overview
All of the living organisms on Earth are made up of one or more cells, which are the simplest units of life capable of independent existence and reproduction. Cells have the extraordinary ability to make nearly identical copies of themselves by the process of cell division. Since new cells are only produced by existing cells, cell division is essential for the continuation of life.
There are a variety of reasons that might cause a cell to divide:
- Multicellular organisms grow in size and complexity by making more cells.
- Old and damaged cells are continuously replaced by the division of cells.
- Single-celled organisms such as bacteria divide to make new, independent organisms.
-
Two events are required for successful cell reproduction. First, the "parent" cell must ensure that each new "daughter" cell receives a complete copy of its hereditary information. This information is transmitted in the form of complex molecules called DNA, and directs
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .