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29 Cards in this Set
- Front
- Back
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Who invented the first practical light microscope?
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In the early 1600's, Anton van Leeuwenhoek invented the first practical light microscope.
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The first microscopic creatures Anton observed were?
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Animalcules in pond water.
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In 1665, Englishman Robert Hooke discovered and observed?
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Thin slices of plant tissue (cork) and discovered plant "cells".
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Why did Robert Hooke name them "cells"?
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The "cells" reminded him of a monestary's tiny rooms which were also known as cells.
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In 1838, the German botonist Schleiden concluded?
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That all plants are made of cells.
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(a year later, 1839) the German Schwann concluded what about animals?
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That all animals are made of cells.
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Rudolf Virchow (German) summarized by stating?
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"Where a cell exists, there must have been a pre-existing cell."
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The Cell Theory states? (3 key points)
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1)All living things are composed of cells.
2)Cells are the basic units of structure and function in living things. 3)New cells are produced from existing cells. |
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What stuctures are common to most cells?
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A cell membrane, cell wall, nucleus, and cytoplasm.
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All cells have a cell membrane and cytoplasm, but not all cells have a? (2)
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Nucleus or a Cell Wall.
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What is in the cytoplasm of a cell?
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Organelles
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Eukaryote is a cell?
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Containing a nucleus, and typically other specialized cells called organelles.
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Prokaryote is a cell?
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Do not contain a nucleus, and have smaller, less complex systems in comparission to eukaryotes.
*All bacteria are Prokaryotes* |
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Plants, animals, and fungi are all?
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Eukaryotes
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Which kind of cells have cell walls?
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Plants, algea, fungi, and nearly all prokaryotes.
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Animal cells in particular do not have...?
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Cell Walls
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The main function of the cell wall is to?
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To provide structure and protection.
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What is the cell wall made of?
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Cellulose, a tough carbohydrate fiber.
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Who was the first person to I.D. a cell nucleus? (1831)
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Botonist Robert Brown
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What the the nucleus control?
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Most cell processes and contains the hereditary information of DNA
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Which cells contain a nucleus?
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Eukaryotes
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What structures are visible from within a cross section of a nucleus?
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The nuclear envelope, nuclear pores, chromatin, and the nucleolus.
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What is chromatin?
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granular material visible within the nucleus, consists of DNA tightly coiled around proteins.
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What are chromosomes?
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thread-like structures within the nucleus containing the genetic information that is passed from one generation of cells to the next.
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Nucleolus?
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a small dense region within most nucleiin which the assembly of ribosomes occur.
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Ribosomes?
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a small partice in the cell on which proteins are assembled, made of RNA and protein.
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Endoplasmic Reticulum?
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internal membrane system in cells in which components of the cell membraneare assembled and proteins are modified.
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Cytoskeleton?
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network of protein filaments within some cells that help the cell maintain its shape and is involved in many forms of cell movement.
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Difference between rough and smooth endoplasmic reticulum?
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Rough- Ribosomes stud its surface
Smooth- |
