Cell notes-Questions and Answers Graded A+

Cell notes-Questions and Answers Graded A+ Cell Theory - ANSWER-The cell theory is the unifying theme in biology because it emphasizes the similarity of all living things. Similarity of all living things - ANSWER-1. All living things are made of cells. 2. Cells are the basic unit of structure and function in all living things. 3.All cells come from preexisting cells. Characteristics of organism - ANSWER-1. All organisms conduct the same basic processes in order to survive. 2.A single-celled organism has to conduct all life processes by itself. 3.A multicellular organism has groups of cells that specialize to perform specific functions. Prokaryotic Cells - ANSWER-1. Earth's first cells were simple life forms called prokaryotes. 2. Exist in two major forms: eubacteria and archaebacteria. 3.Earth's most abundant inhabitants. They can survive in a wide range of environments and obtain energy in a variety of ways. Prokaryotic Cells (cont'd) - ANSWER-Prokaryotic cells lack a nucleus and membrane-bound organelles (ex. mitochondria, endoplasmic reticulum) Some use flagellum for locomotion ALL are UNICELLULAR Examples: bacteria, blue-green algae Eukaryotic cells - ANSWER-Eukaryotic cells have a nucleus and membrane-bound organelles (mitochondria; E.R.; chloroplasts) Arose (came from) prokaryotic cells but are more complex Can be both unicellular or multicellular Examples of eukaryotes are: All fungus, plant,and animal cells Plant Cell - ANSWER-Cell wall surrounding the cell membrane. No centrioles.