Animal cells are the basic unit of life for all animals. They have a variety of structures that perform specific functions. The cell membrane is the outermost layer of the cell. It acts as a barrier, controlling what enters and leaves the cell. The cytoplasm is the jelly-like substance ins...
Cells are the lowest level of organization of an organism. Cells are said to be the basic or primary level of organization Cells are the smallest unit that can perform all the processes necessary for life. The first cell of a chicken is one of the largest cells in the world. An ostrich ...
Structure and Function In an organism, structure and function are related. Example: Alveoli air sacs in the lungs: See fig. 4 p.79 End of Ch 3 Cells: The Basic Units of Life
Cells are the basic building blocks of organisms. Living organisms can be classified into unicellular and multicellular organisms, which are made up of cell(s). What are unicellular organisms? Unicellular organisms are simple organisms made up of only one cell. Example: paramecium, bacteria, and y...
the complexity of a cell is not related to the number of genes it contains, indeed, modern bacteria are as complex as eukaryotes; thirdly, the unit of early life was an 'ecosystem' rather than a 'cell'; fourthly, the early cell needed no genes at all; fifthly, early life depended on...
Instead a gel-like substance that fills the cell. The organelles of the cell are suspended in the cytoplasm and can move around in it. cell wall Part of plant cell. A waxy outer layer that surround plant cells outside of the cell membrane. chloroplasts Part of a plant cell. organelles ...
的下面,成为…的基础 generalization 一般规则,推广,概括 unify 统一,使成一体 gland腺unspecialized未分化的 Notes (Lines3-5)Thesimpleststructuralunits intowhichacomplexmulticellular organismcanbedividedandstillretainthe functionscharacteristicoflifearecalled cells.一个复杂的多细胞器官能被分解成的、保留生命特征...
There's a cell theory which is made up of four basic ideas.First, cells are the building blocks of life.Second, cells are derived from other cells by division.Third, cells contain DNA(the blueprint for life).Fourth, the cell is the functioning unit of life, and the chemical reactions ...
somatic cell,vegetative cell- any of the cells of a plant or animal except the reproductive cells; a cell that does not participate in the production of gametes; "somatic cells are produced from preexisting cells"; hematopoeitic stem cell- blood forming stem cells in the bone marrow; T cel...
Cancer cells inevitably interact with neighboring host tissue-resident cells during the process of metastatic colonization, establishing a metastatic niche to fuel their survival, growth, and invasion. However, the underlying mechanisms in the metastatic niche are yet to be fully elucidated owing to the...