biodiversity of micro-organisms
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do not belong to any of the 5 kingdoms ,they have both characteristics of living and non-living organisms
viruses
why are viruses considered living
the reproduce when they are within the cells of a living organism
why are viruses non-living
• they cannot respire • they cannot reproduce on their own • when outside of a host they form crystals around them in order to survive
virus that attacks bacteria
bacteriophage
outer coat of a virus
protein coat
what nucleic core does a virus that attacks a plant or bacteria have
RNA
viruses have other cell structures , true or false
false
viruses are a-cellular?
true
an organism that does not have cell structures(organelles)
a-cellular or non-cellular
general characteristics of viruses
• are a-cellular • do not perform metabolic activities • are parasitic • they are obligate endoparasites as they only reproduce inside their host • they are pathogens as they cause diseases • antibiotics are ineffective on viruses as they are non-living
classification of bacteria
-unicellular -are prokaryotic( they lack a membrane-bound organelle) -some are pathogenic ( cause disease ) -most bacteria are heterotrophic bacteria (cannot manufacture their own food ,some are autotrophic -
role of bacteria in maintaining balance in the environment
• some bacteria are decomposers they breakdown organic matter to keep the soil healthy • some bacteria are heterotrophic they cannot make their own food so they depend on the environment for food • other bacteria are autotrophs and they make their own food
environmental importance of viruses
in nature viral diseases play an important role in maintaining healthy population sizes in ecosystems