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| Most prokaryotes are ___, but some species form ___. |
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| Prokaryotes have great genetic ___. |
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| spheres rods, and spirals |
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| Prokaryotes have a variety of shapes, but the three most common are ___, ___, and ___ |
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| Prokaryotic cells have a ___ which maintains cell shape provides physical protection and helps prevents the cell from bursting in a hypotonic environment |
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| referring to a solution that, when surrounding a cell, will cause the cell to take up water |
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| The cell wall of many prokaryotes is covered by a ___, a sticky layer of protein |
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| Some prokaryotes have hairlike structures called ___ which allow them to stick to their substrate or other individuals in a colony |
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| Most motile bacteria propel themselves by ___ |
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| Many bacteria exhibit ___, which is the ability to move toward or away from stimuli. Others grow toward or away from stimuli in the way that plants do. |
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| a long ring of DNA that is not surrounded by a membrane |
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| The typical prokaryotic genome is: |
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| Some bacteria also have smaller rings of DNA called ___ |
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| ___ can be considered to be independent life-forms similar to viruses |
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| Prokaryotes reproduce quickly by a method called ___ |
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| Prokaryotes can divide every ___ if conditions are good |
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| Many prokaryotes form ___, which can remain viable in harsh conditions for centuries |
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| ___ speeds up prokaryote evolution |
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| these types of prokaryotes require oxygen |
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| these types of prokaryotes are poisoned by oxygen |
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| These types of prokaryotes can survive with or without oxygen |
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In a process called ___, some prokaryotes convert atmospheric
nitrogen to ammonia |
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| Since nitrogen fixation can only be done in the absence of oxygen, these bacteria live inside ___, in an oxygen-free environment. |
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| ___ between prokaryotes accesses resources they could not get individually |
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| Until the late 20th century, Taxonomists based prokaryotic taxonomy on ___ characteristics |
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| ___ nowadays is producing a new phylogenetic tree of the prokaryotes with major new clades |
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| proteobacteria and Gram-positive bacteria |
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| What are the two largest groups of bacteria? |
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| The ___ were discovered more recently. They share some traits with bacteria and other traits with eukaryotes |
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| No ___ are known so far to cause disease |
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| None of these form spores |
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| ___ thrive in very hot environments |
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| ___ live in high saline environments |
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| ___ live in swamps and marshes, and produce methane as a waste product |
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| One cow can produce 1000 liters of ___ per DAY |
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| Some scientists have proposed that the methane in the Martian atmosphere may be indicative of ___ there. |
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| prospects for any other life surviving would be dim |
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| Prokaryotes are so ecologically important that if they were to disappear the ___ |
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| Prokaryotes play a major role in the ___ of chemicals in the ecosystems |
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| Prokaryotes act as ___, breaking down corpses, dead vegetation, and waste products |
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| Many prokayotes live with other organisms in ___ relationships |
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| Most cells in the human body are ___. |
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| The bacteria in our bodies are ___, which means that they share our food but do us no real harm |
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| an organism or virus that causes a disease |
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| Prokaryotes cause about ___ of all human diseases. |
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| Pathogenic prokaryotes typically cause disease by ___ |
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Many pathogenic bacteria are potential
___ |
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| Prokaryotes are the principal agents in ___, which is the use of organisms to remove pollutants from the environment |
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| An erroneous grouping that consisting of an ancestral species and some, but not all, of its descendants |
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