高等环境微生物学.pdf

CHAPTER 2 The Organization of Cell The Cell: The Basic Unit of Life Basic features of all cells:  Plasma membrane  Semifluid substance called cytosol  Chromosomes (carry genes): DNA and RNA  Ribosomes (make proteins) Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Fig. 6-2 10 m Human height 1 m Length of some nerve and e muscle cells y e 0.1 m d e Chicken egg d i a n 1 cm U Microscopy Frog egg 1 mm e p Robert Hooke o 100 µm c s o Most plant and r c animal cells i A.V. Leeuwen 10 µm m Nucleus t