how many kinds of micro organisms we have in nature?
470106
an unlimited amount. at least millions. the exact number would be impossible to assume, or calculate.
707688
Multicellular organisms
97603
Chose the ecosystem first, there are virtually an infinite number based on how you define one.  The biological components are the living things in a specific ecosystem.  \n\n"the physical and biological components of an environment\n\n"The size and scale of an ecosystem can vary widely. It may be a whole forest, as well as a small pond, or even the geobiosphere itself. Different ecosystems are often separated by geographical barriers, like deserts, mountains or oceans, or are isolated otherwise, like lakes or rivers. As these borders are never rigid, ecosystems tend to blend into each other. As a result, the whole earth can be seen as a single ecosystem, or a lake can be divided into several ecosystems, depending on the scale used."
307185
Bacteria is a "group noun" (like a flock) for a single type of bacteria. For example "300 e. coli bacteria." (similar to 300 in the flock (flock is singular))\n\nBut when referring to different types of bacteria the noun is typically plural. For example "the the surface of human skin is infested with many bacterias, some harmful, some harmless."  (similar to "the many flocks that we saw flying south for the winter")
1013218
A\nAerobiology -- Anatomy -- Arachnology-- Astrobiology\n\n\nB\nBiochemistry -- Bionics -- Biogeography -- Bioinformatics -- Biological psychiatry -- Biomechanics -- Biophysics-- Biotechnology -- Botany\n\n\nC\nCell biology -- Chorology -- Cladistics -- Carcinology -- Cryptozoology -- Cycles -- Cytology\n\n\nD\nDevelopmental biology -- Disease (Genetic diseases, Infectious diseases) -- Ecology (Theoretical ecology, Symbiology, Autecology, Synecology)\n\nE\nEnvironmental Biology -- Epidemiology -- Ethology -- Entomology -- Evolutionary biology (Evolution) -- Evolutionary developmental biology -- Endocrinology\n\n\nF\nFelinology, Freshwater biology\n\n\nG\nGenetics (Population genetics, Quantitative genetics, Genomics, Proteomics) --\n\n\nH\nHerpetology -- Histology -- Human biology (Anthropology) -- Ichthyology --\n\n\nI\nImmunology -- Infectious diseases\n\n\nJ\n\nK\n\nL\nLimnology\n\n\nM\nMalacology -- Mammalogy -- Marine biology -- Microbiology (Bacteriology) -- Molecular biology -- Morphology -- Mycology (Lichenology) -- Myrmecology --\n\n\nN\nNematology -- Neuroscience (Neuroanatomy, Neurophysiology, Systems neuroscience, Biological psychology, Psychiatry, Psychopharmacology, Behavioral science, Neuroethology, Psychophysics, Computational neuroscience, Cognitive neuroscience, Cognitive science)\n\n\nO\nOncology (the study of cancer) -- Ontogeny -- Origin of life -- Ornithology\n\n\nP\nPaleontology (Paleobotany, Paleozoology)-- Parasitology -- Pathology -- Phycology (Algology) -- Phylogeny (Phylogenetics, Phylogeography) -- Physiology -- Phytopathology-- Population Biology\n\n\nQ\n\nR\nReproductive biology\n\n\nS\nStructural biology -- Systems biology -- Sociobiology\n\n\nT\nTaxonomy -- Toxicology (the study of poisons and pollution)\n\n\nU\n\nV\nVirology\n\n\nW\n\nX\nXenobiology\n\n\nZ\nZoology
18486
Since Linnaeus began his work in the mid-eighteenth century, ~1.7 million species have been identified and described to date.  However, many of them have become extinct now.  About 10 to 100 million species are not discovered yet.
553651
u must be knowing that all organisms are classified into five kingdoms-monera,protista,anemalia,fungi and alge.\n\nthe MONERA phlum[group] consists of bacteria which are prokaryotic in nature -i.e, the cell doesnot have membrane bound organneles or nucleus.\n\nthe Protista group consists of organisms that are eukaryotic in nature-that is they have well defined organneles.\nthis is one reason that bacteria is kept in two separate groups.
414931
Biology\nEnvironmental Science\nChemistry
1099027
Greetings from inside the Yahoo Brain in New York City!\nHope you're catching the live webcast at: http://advision.webevents.yahoo.com/asktheplanet/brain.html !\n\nI thought there were 5 main branches of biology:\n\n1.  ZOOLOGY: the study of animals\n2. BOTANY: the study of plants\n3. MICROBIOLOGY: the study of viruses, monerans, and protists\n4. BIOCHEMISTRY: the study of the chemical nature of life\n5. ECOLOGY: the study of the interaction among organisms in ecosystems\n\nHope this helps!\n\n--J.
932927
Microbiology is the study of microorganisms, which are unicellular or cell-cluster microscopic organisms. This includes eukaryotes such as fungi and protists, and prokaryotes such as bacteria and certain algaes. Viruses, though not strictly classed as living organisms, are also studied[1].\n\nAlthough much is now known in the field of microbiology, advances are being made regularly. The most common estimates suggest that we have studied only about 1% of all of the microbes in any given environment. Thus, despite the fact that over three hundred years have passed since the discovery of microbes, the field of microbiology is clearly in its infancy relative to other biological disciplines such as zoology, botany and entomology.\n\nYou could get more information from the link below...
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Scientists cannot be sure. We haven't found all species on the planet. So I presume that the number of genetic codes is equivalent to the number of species. \n\nIn order for a species to be called a species, it must have a different genetic code from another species.
6888
First off jamesmusik84's is completely wrong. Please don't consider any of it. The second answer is along the right path, except I have no idea what the reference to antibiotic is suggesting and some viruses have RNA genomes but many more have DNA genomes. And as far as bacteria go, both RNA and DNA are present inside there cells.\n\nSo, the answer to your question. Let's start this way: Bacteria are small single-celled organisms. Unllike eukaryotic cells (like the ones that make up animals, plants, fungi and many single-celled organisms such as yeasts) which package their genetic material (DNA) in membrane structures called nuclei, bacteria (which are also referred to as prokaryotes) don't have a nucleus. Bacteria also don't have other organelles which are found in eukaryotes, such as endoplasmic reticulum, mitochandria, chloroplasts, golgi bodies, etc. But like eukaryotes, bacteria do have an outer lipid membrane.\n\nSo, you can think of bacteria of little fluid filled sacs. Along with eukaryotic, bacteria are an example of "cells" which are the smallest unit of living things on earth.\n\nViruses, on the other hand, do not have an outer membrane. They don't the capacity to make their own proteins. They don't have the capacity ot replicate or metabolize on their own -- of which bacteria (and eukaryotes) do. It's for this reason that we don't consider viruses "living" things. Viruses have to "infect" a cell -- injecting its genetic material inside -- and use the cell's metabolic machinery to reproduce.\n\nViruses are essentially small protein "capsules" that have a piece of genetic information packaged inside. Because viruses are required to infect a cell to propogate themselves, they are classified as obligate intra-cellular pathogens.\n\nViruses tend to only infect specific cell types. Some infect bacteria. Some infect plants. Others infect animals. The specificity of what a virus can infect is goes beyond whether they can infect bacteria, plants or animals. Usually viruses have to infect a very specific animal, plant or bacteria. And even in the case of viruses that infect animals and plants, not only do the infect specif animals, they are usually limited to a few cell types whithin that animal.\n\nTake HIV for example: to the best of my knowledge HIV only infects humans (i.e. the "H" in HIV -- Human Immunodeficiency Virus). But it doesn't just infect any human cell. HIV only infects white blood cells -- specifically a class of white blood cells called T cells (there are many other "classes" of white blood cells including such things as B cells, NK cells, neutrophils, basophils, eosinophils and macrophages).\n\nI hope this sheds some light on the matter.
30226
A) Fungi\n\n(although technically yeast are fungi and they are single-celled)
804927
bacteria, viruses, cyanobacteria or fungi?  or do you mean specific examples
1169797
There are about 250,000 angiosperm species (flowering plants and trees), and about 80,000 gymnosperm species.  Include the other groupings, and the total comes to about 370,000.\n\nThat said, it is estimated that we have discovered only between 10 and 40% of all known species (and we probably never will discover them given the rate of destruction of habitats such as rain forests.\n\nSo the total is probably between 1.5 and 3.7 milliion, though it's a moot point because we'll never, ever know!
825792
You have to be more specific.  Microorganisms grow in pretty much every condition on Earth, including hot and sulfurous ocean water by volcanic vents, in ice at the poles, in badly-preserved jars (botulism--anaerobic), inside the body, in ponds, in caves, in the dark, in the sunlight...it all depends on the specific type of microorganism.\n\nFor instance, sugar tends to kill bacteria, but mold loves sugar.  So a jar of jelly left in a fridge for a long time (cold, wet, sugary environment for the microorganisms) might not have bacteria, but it could have fuzzy mold on it.  It all depends.  \n\nBut from a food safety standpoint, you want food kept either below 40 degrees fahrenheit, or above 140 degrees, and keep it wrapped up and covered to avoid stuff dropping in it.  In general, microorganisms like: warm (not hot or cold), dark, moist, and somewhat neutral pH.  That'll grow mold, mildew, fungus, and many types of bacteria.  They usually don't like clean surfaces and they tend to die in chlorine bleach.
230027
Diversity is a term that refers both to the different classes of items in a given system, and also to the distribution of those items in those classes.\nBiological diversity or biodiversity is related to the concept of biocomplexity, that is, the web of interelationships and fluxes circulating in the ecosystem. It is usually measured at three levels: ecological biodiversity, species biodiversity and genetic biodiversity.\n\nSpecies biodiversity is not only the number of species in a given ecosystem, but also the proportion of individuals that belong to each species. \nExample: \nIf you have 10 species, but out of a 100-individuals sample, 91 belong to a single species, then the biodiversity is not that high. In probabilistic terms, you  could say that the chances of finding 9 of the 10 species in any sample is low. \n\nThe rainforests of the world are classical examples of high diversity ecosystems. In contrast, most ecosystems that are under continuous stress are less biodiverse, for example deserts, or grasslands. However, low biodiversity does not necessarily mean "less healthy" ecosystems. Although a grassland is less biodiverse than a rainforest, it's a stable biome all the same.\nA related concept, ecological biodiversity, refers to the variety of ecosystems in a given area, and the pattern of distribution of communities in a given landscape. No ecosystem is completely isolated from others and the health of each one depends partly on the interrelationships with other areas, therefore, the loss of ecological biodiversity due to the disappearance of certain environments can lead to greater unbalances.\nGenetic biodiversity refers to variety at genetic level. In a population, it refers to the different alleles (variations of a single gene) that are present. We know that evolutionarily speaking, polymorphisms (presence of different alleles) are a sign of a healthy population, because a greater source of variation is a better resource to respond to environmental changes. Populations that lose their genetic biodiversity (for example, because the number of individuals is severely reduced) may be more exposed to extinction. \nBiodiversity can be measured at all the organization levels studied by Ecology, but is especially focused in communities and ecosystems.