interdependence of organisms
119550
Both food chains and food webs are ecological models, that is, simplified representations of some aspects of an ecosystem. \nIn the case of a food chain, it's a schematic representation of the "eats/is eaten by" relationship; really simple and unidimensional. Each trophic level is occupied by one species, and arrows indicate who eats who. \nThis is a diagram of a simple food chain:\nhttp://www.ddc2000.com/products/samples/s2kwebdemo/support/data/unit00/06images/2502.jpg\n\nHowever, in most ecosystems there are many different species in each trophic level, and many organisms that may occupy different levels (for instance an omnivorous animal can be both a first order and second order consumer). Thus, the food web is a more complex model, usually a better approximation to reality, in which many arrows go from and to each component. \nA food web looks like this:\nhttp://www.agen.ufl.edu/~chyn/age2062/lect/lect_28/40_07.GIF\n\nMore complicated, but the same type of model that only shows trophic (alimentary) relationships.
392727
Few  processes on earth operate in isolation; areas on our planet are interconnected, which means linked to conditions elsewhere on earth. A condition, an occurrence, or a process in one place generally has an impact on other places. The exact nature of this interaction is not known. For example the presence of abnormally warm water off south Americas west coast (El Nino) seems to be related to unusual weather in other places in the world.
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If you eliminate the evidence, there is no evidence.  Highly advanced reasoning.  You just forgot to wipe every living creature off the face of the Earth.  The careful observations of the variation of forms, coupled with the pattern of variation in the genomes of like and unlike forms is a scientific method of demonstrating the relative relatedness of every living creature.
224391
It is called endosymbiosis. This is the process in which prokaryotes slowly integrated with other prokaryotes (mitochondria or chloroplast) to form eukaryotes
438425
Yes, all organisms(living things) have DNA.
508026
I would just talk about way plant and animal cells are constructed like cell walls and stuff. And talk about differences in how they make energy like animals burn sugar and plants first make sugar themselves. I'm sure that could be used to discuss nutrients issues.
416002
My biology teacher taught it as the Independent variable being the thing I control. The I in independent with the I in I helps me remember.\n\nAnd then the dependent variable depends on the independent. It's the thing you're looking for the change in.
4175
There are a number of examples in which prokaryotic organisms coalesce into multicellular structures. One of those examples are in a group of bacteria called myxobacteria. In this case, myxobacteria form what's called fruiting bodies as part of their life cycle (see the link below for a picture of a fruiting body).
216999
Genetics and evolution.
77011
If you want me to use those specific terms it sounds like you're going to just copy what I write for your assignment.  I'd be happy to explain the process to you, by I'm not going to write your homework paper.\n\nThe idea is that plants produce food using energy from the sun, and all other life either directly eats plants or eats things that eat plants.  So all life (except some protists, that, like plants, can make their own food) lives on energy that the plants have harvested from the sun.\n\nI hope you already know what the laws of thermodynamics, photosynthesis, and respiration are.  If not, pay more attention in class or look them up on Wikipedia.  You should be able to figure out how to phrase the explaination in a way that uses those terms on your own.
347562
The endosymbiotic theory states that higher order organisms (read eukaryotes) developed over time as a symbiotic relationship developed between earlier prokaryotic organisms. This is most routinely applied to the conceptual arrangements surrounding chloroplasts and plant cells and mitochondria and all cells. The theory states that a free living organism in the prokaryotic lineage developed a capacity for absorbing another energy producing type of organism. The interaction was able to provide a survival advantage for the newly formed organism and thus was maintained. Mitochondria do contain their own genome, but their array of required proteins come from both the mitochondrial genome and the nuclear genome.
280303
well...\nu could talk about how little we know about whether organisms like bacteria and viruses have consicousness and a probable effect that might happen if we change their genomes . we dont really know whether those kind of organisms have an "individuality" or anything, so thats where i would start off from.\nhope this helped
402899
I took this from wikipedia. It's for reference!!\n\nAn ecosystem, a contraction of "ecological" and "system", refers to the collection of components and processes that comprise, and govern the behavior of, some defined subset of the biosphere. The term is generally understood to refer to all biotic and abiotic components, and their interactions with each other, in some defined area, with no conceptual restrictions on how large or small that area can be. \nIn biology, Abiotic components are nonliving chemical and physical factors in the environment. Often, these are described as light, temperature, water, atmospheric gases, wind as well as soil (edaphic) and physiographic (nature of land surface) factors.\nThese factors could be said to be the definitions for the exact environmental conditions in which plants need to grow.\nOxygen, carbon dioxide, and nitrogen are the most commonly described gasses; and the wind, soil, and physiographic conditions can also combine in multiple ways to affect organisms.\nIn general terms an ecological system can be thought of as an assemblage of organisms (plant, animal and other living organisms—also referred to as a biotic community or biocoenosis) living together with their environment (or biotope), functioning as a loose unit. That is, a dynamic and complex whole, interacting as an "ecological unit."\n\n\nOther population ecologists, stochastists, (den Boer & Reddingius, 1996), view an ecosystem as an expression of stochastic events, and corresponding responses from organisms. Thus, ecosystems result from the sums of infinite individual responses of organisms to stimuli from non-living and living elements in the environment. The presence or absence of populations merely depends on reproductive and dispersal success and population levels fluctuate in response to stochastic (chance) events. As the number of species in an ecosystem is higher, the number of stimuli is also higher.\n\nCheck the link for more info you need. I'm not familiar with this, besides basic info but hopefully this helps.
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Yes, try to this!\n\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=3906008
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a- multi\nb-both\nc-both (plants like bacteria and animals)\nd-single celled
480238
Evolution and the means to survive.
222178
adaptive significance of coprophagy