| A | B |
|---|
| What is the smallest unit that can perform all the processes necessary for life? | cell |
| Robert Hook and Anton van Leeuwenhoek not only helped discover cells but | helped discover the microscope |
| Leeiwenhoek called the single-celled organisms that he found in pond scum "animalcules". Today we know them as | protists |
| Scientist Matthias Schleiden contributed to the cell theory bu concluding that | all plant parts were made of cells |
| What is not part of cell theory? | Animals and plants share the same kinds of cells |
| Most cell are a very small size because | their volume is limited by how large their surface area is |
| the part of the cell that keeps the cytoplasm inside and controls materials going in and out of the cell | cell membrane |
| structures that are usually surrounded by membranes and which perform specific functions within the cell | organelles |
| an organelle that contains the cell's deoxyribonucleic acid | nucleus |
| a single-celled organism that has no nucleus or membrane-bounf organelles | prokaryote |
| the smallest and most common form of prokaryotes, containing DNA, ribosomes, and a flagellum | eubacteria |
| prokaryotes that include such types as heat-loving, salt-loving, and methane-making | archaebacteria |
| organisms made up of cells that have a nucleus and membrane-bound organelles | uekaryotes |
| word that describes most organisms that you can see with your naked eye | multicellular |
| What cell part supports the cell and might be made of cellulose or chitin? | cell wall |
| What part of the cell forms a barrier between the cell and its environment? | cell membrane |
| What part of the cell keeps the cell membrane from collapsing? | cytoskeleton |
| A cell's nuclues contains DNA, which carries genetic material with | instructions for how to make protein |
| Ribosomes, the organelles that make proteins, are found on the membranes of the | endoplasmic reticulum |
| What part of the cell acts as the cell's delivery system? | endoplasmic reticulum |
| Energy released by a cell's mitochondrion is stored in | ATP |
| What cell parts carry materials between organelles such as the ER and the golgi complex? | vesicles |
| Larger size, longer life, and specialization are three advantages to being a | multicellular organism |
| What is true of each of the four levels of organization of living things? | Each is more complex than the level below it |
| The function of a part of an organism is related to | the structure of that part |
