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Ch. 18 - 20 biology viruses and bacteria

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non- living particles, don't grow respire, develop
a virus that infects a bacterium
inner core rna or dna
outer core of protein of viral structure
recognizes and attaches tp receptors sites on cell's plasma membrane
virus attaches, expels, takes over, reproduce and exit with killing it
integrated "provirus" and exitby exocytosis
1st virus to be identified or tobacco mosaic virus
provirus has lysogenic cycle
have nucleic acid RNA
some undergo photosynthesis or chemosynthesis
placed on bacteria which turns pur or pi depending on the structure of their cell walls
gram negative
gram positive
rod shaped
round shaped
help bacteria survive in harsh conditions
can lay dormant for thousands of years and still survive
kills certain bacteria
spiral shaped
two main groups protozoans and algae
classified by their mobility
move and feed by false fett called psuedopods
move by cilia ex. paramecium
move by a flagella ex. euglena
parasitic protozoans ex. trypanosoma
golden algae (diatoms) unicellular outer shell made of silica
fire algae (dinoflagellates) unicellular responsible for red tide
green algae (spirogyra) multicellular
brown algae (kelp,sargassum) multicellular
red algae (polysiphonia) multicellular

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