Term
| Who were the scientists connected to cell theory? |
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Definition
Anton van Leeuwenhoel- used a microscope to observe pond water and saw many tiny organisms.
Robert Hooke- used a microscope to observe a cork and saw tiny chambers he called cells. |
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Term
| What did Schleiden and Schwan contribute to cell theory? |
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Definition
| All plants and animals are made of cells. |
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Term
| What are the principales of cell theory? |
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Definition
a. all living things are made up of cells.
b. cells are the basic units of structure and function in living things.
c. new cells are produced from existing cells. |
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Term
| what are the characteristic of proaryotes? |
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Definition
| Contain DNA surrounding by a cell membrane or plasma membrane do not encloses nuclei in membranes so not have a nucleus generally snaller and simpler than eukaryotes with few cells and no specialised organelles they carry aot ALL the activities associated with living things-grow, reproduce, respond to the environment and in some cases move. Bacteria or Prokarotes. |
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Term
| What are the charactereistics of eukaryotes? |
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Definition
| Enclose their DNA in a nucleus larger and more complex contain dozens of highly specialized structures display great variety can by unicellular or multicellular can be plants,animals or fungi. |
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Term
| what occurs in the nucleus? |
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Definition
| Stores DNA and the colded intructions for making protiens and other molecules.Is surrounded bya nuclear membrane with thousands of pores whick allow material to move in and out. Chromosomes, carrying the genetic information alos founs have a small dense region in the center - the nucleolus - where ribosome assembly brgins |
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