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Science-Chapter 17
Question | Answer |
---|---|
What is the smallest unit that can perform all the processes necessary for life? | Cell |
Who was the scientist who first described cells? | Robert Hooke |
Who discover single-celled organisms including bacteria? | Anton van Leeuwenhoek |
Who concluded that all plant parts were made of cells? | Matthias Schleiden |
Who concluded that all animal tissue were made of cells? | Theodor Schwann |
Who concluded that all cells come from existing cells? | Rudolf Virchow |
What are the 3 parts of the Cell Theory? | 1. All organisms are made of one or more cells 2.The cell is the basic unit of all living things 3.All cells come from existing cells |
A cell's size is limited by the ratio between the cells what? | The cell's volume and the cell's surface area |
What is the protective layer that covers a cell's surface? | Cell membrane |
What is cytoplasm? | Fluid from the cell and almost all of its content |
What are structures that perform a specifc function in the cell? | Organelles |
What does DNA stand for? | Deoxyribonucleic acid |
What is a organelle that contains DNA and has a role in growth, metabolism, and reproduction? | Nucleus |
What parts do cells have in common? | Cell membranes, organelles, cytoplasm, and DNA |
What are prokaryotes? | Single-celled organisms that do not have a nucleus or membrane-bound organelles |
What is the most common prokaryotes? **hint hint smallest cell** | Bacteria |
What are ribosomes? | Tiny, round organelles made of proteins and other materials |
What does a eukaryotic cell have that a prokaryotic cell does not? | A nucleus |
What does multicellular mean? | Many cells |