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In Science what is a theory?
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Which technology was the most important to the development of the cell theory?
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Science-Cell Theory
Parent Created to help child
| Question | Answer |
|---|---|
| In Science what is a theory? | an explanation that can be repeatedly tested and accepted by the majority of the scientific community |
| Which technology was the most important to the development of the cell theory? | the microscope |
| Describe the meaning of the phrase "cells are the basic unit of structure in all organisms" in your own words. | |
| Why did Hooke call what he saw a "cell"? | Because the dead plant cells looked like little empty rooms |
| How much more powerful was Leeuwenhoek's microscope than the microscopes previously used? | 270 times the magnification |
| What did Leeuwenhoek call the bacteria he saw? | animalcules |
| What is spontaneous generation? | |
| Describe the contributions of Schlieden and Schwann to the cell theory. | |
| What does omnis cellula e cellula mean? Who said this? | cells only come from cells, Rudolf Virchow |
| Create a timeline showing all the major discoveries which led to the development of the cell theory. | |
| What are the three statements of cell theory? | All living organisms are made of at least one cell, The cell is the basic unit of structure and function in living things, cells arise from preexisting cells (all cells come from other cells) |
| Which 3 scientists directly contributed to the "all organisms are composed of cells" part of the cell theory? | Anton Van Leeuwenhoek, Matthias Schleiden, Theodor Schwann |
| Who observed living cells? | Anton Van Leeuwenhoek |
| Who invented the first compound microscope? | Hans and Zacarias Janssen |
| Who invented the compound microscope and coined the term "cell" based on plant cells? | Robert Hooke |
| Who contributed the idea that all cells come from other cells? | Robert Remak |
| Who noticed that all plants were made of cells? | Matthais Schleinden |
| Who concluded that all animals are made of cells? | Theodor Schwann |
| Cells are... | the smallest unit for life |
| Robert Hooke was the first to... | |
| Who is credited with the third statement of the Cell Theory? | Rudolf Virchow |
| What is cell theory? | Where a cell exists, there must have been pre-existing cells |
| Most cells are too | small |
| Cells come in many______ and ______and have different_______ | shapes and sizes and functions |
| Cells are surrounded by a _______ | cell membrane |
| The cell membrane is a___________that covers the cells surface and acts as a ______ | protective layer, barrier |
| The cell membrane also controls________ going in and out of the cell. | materials |
| Inside the cell is the ___________ | cell fluid |
| This fluid and almost all of its components are called the_______ | cytoplasm |
| Cells have _______that carry out various life processes | organelles |
| ______ are structures that perform specific functions within the cell | organelles |
| All cells contain______ at some point in their life | DNA |
| DNA is the ____ material that carries information neede to make new____ and new _____ | cells and organisms |
| DNA is passed on from _____ cells to new ____ and new _______ | parent cells, new cells and controlls cell activity |
| In some cell, the DNA is enclosed inside an ____ called the _______ | organelle called the nucleus |
| Humans have _______ cells. | |
| Bacteria are classified as _____ cells. | |
| _____ cells do not have a nucleus | |
| All cells have _____, ____, and ______. | membrane, organelles, and DNA |
| Cells with no nucleus are _____ cells. | prokaryotes |
| Cells with a nucleus are ______ cells. | eukaryotes |
| Prokaryotic cells are classified into two groups: ______ and ______ | eubacteria (bacteria) and archaebacteria |
| Prokarytotes are ______ organisms that do not have a _____ or membrane bound _______ | single-celled and no nucleus |
| The most common prokaryotes are _______ | bacteria |
| _________ is the world's smallest cell. | Bacteria |
| Bacteria do not have a ______ but they do have ________. | no membrane, yes ribosomes |
| ________ is not as common as bacteria. | |
| Archaebacteria and bacteria are similar in that they both are _______ they both have a ______, _______ and they both lack a ______ and membrane-bound ____________ | |
| Eukaryotic cells are the _______cells | largest |
| Eukaryotic cells have a ___________. | |
| A cells nucleus holds the cells _____________ | |
| Organelles are like the different ______ in the body | |
| Organisms made of eukaryotic cells are called | |
| Many eukaryotes are ______ | |
| Multi cellular organisms are usually _______ than single-cell organisms | |
| Animals, humans and plants are _________ |
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