The Diversity of Cells
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the smallest unit that can perform all the processes necessary for life? | cell
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| Who was the first person to describe cells? | Hooke
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| Who discovered single-celled organisms including bacteria? | Leeuwenhoek
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| Who concluded that all plant parts were made of cells? | Schleiden
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| Who concluded that all animal tissues were made of cells? | Schwann
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| Who concluded that all cells come from existing cells? | Virchow
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| Why can a chicken egg grow so large? | It doesn't have to take in nutrients
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| What limits most cells to a very small size? | the surface area-to-volume ratio of the cell
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| How would you calculate the surface area-to-volume ratio? | divide the total surface area of the cell by the cell's volume
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| What are "animalcules" today known as? | protists
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| Who helped to develop the microscope? | Robert Hooke and Anton van Leeuwenhoek
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| What does the phrase "does everything needed for life" describe? | a cell
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| Where do all cells come from? | cells
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| What protects the inside of a cell from the outside world? | cell membrane
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| How are archaebacteria different from eubacteria? | archaebacteria have different ribosomes
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| Why did Robert Hooke think animals didn't have cells? | he couldn't see their cells in a microscope
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| Which two things must be compared to explain why almost all cells are small? | surface area and volume
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| What is an organelle that is membrane-bound? | it is surrounded by membranes
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| What type of DNA do both archaebacteria and eubacteria have? | circular DNA
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| What is cytoplasm? | the fluid inside a cell
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| What are cells that have no membrane-covered organelles? | prokaryotic
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| What four elements do all cells have in common? | cell membranes, organelles, cytoplasm and DNA
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| What are three elements that plant cells have and animal cells do not? | cell walls, chloroplasts and chlorophyll
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| Why weren't cells discovered until 1665? | almost all cells were too small to be seen with the naked eye
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| What invention made cells discovery possible? | microscope
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| When Robert Hooke saw the "juice" in some cells, what was he looking at? | cytoplasm
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| What are ribosomes? | tiny, round organelles made of protein and other material
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| What is the surface area-to-volume ratio? | the reason that most cells are limited to a very small size
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| What is the cell membrane? | a protective layer that covers the cell's surface and acts as a barrier
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| What are organelles? | small bodies in a cell's cytoplasm that are specialized to perform specific functions
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| What contains the cell's DNA and has a role in growth, metabolism and reproduction? | nucleus
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| What is a prokaryote? | an organism that consists of a single cell that doesn't have a nucleus or membrane-bound organelle
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| What is eubacteria? | prokaryotes that are the smallest cells and have ribosomes
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| What is archaebacteria? | prokaryotes that incude extremophiles
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| What are extremophiles? | organisms that live in extreme conditions
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| What is a eukaryote? | an organism made up of cells that have a nucleus enclosed by a membrane
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| What is DNA? | genetic material in cells
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| What is a cell with a nucleus? | eukaryote
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| What is cell without a nucleus? | prokaryote
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| Where is DNA stored? | nucleus
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| What is a word that describes most organisms that you can see with your nakeb eye? | multicellular
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| What are the two basic kinds of cells? | eukaryotes and prokaryotes
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| How do eukaryotes compare in size to prokaryotes? | eukaryotes are about 10 times larger
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| Does eukaryote or prokaryote best describe humans? | eukaryote
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Created by:
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