The ultimate source of energy for a food chain is the...?
341341
sun, this powers producers (plants), which are used by both decomposers and herbivores, which are eaten by predators. while plants often require decomposers for nutrients besides the sun's energy, the decompsers would get nothing without the plants, and the plants would get nothing without the sun.
962900
The main mechanism of energy production in the body is through the formation and oxidation of adenosine triphosphate, ATP.  Cells convert carbohydrates (which we eat) into ATP, and then oxidize the molecules later to access the energy in their chemical bonds.
865842
Energy\n\nA chemical reaction simply supplies energy to the system
192285
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.
400379
Not the most specific question, but I'm guessing you're asking about energy storage. Plants use sunlight to make glucose from carbon dioxide and water, thus converting light energy to chemical (food) energy and providing the basis for life on earth as we know it.\n\nThe simple glucose molecules are then strung together to make complex carbohydrates, which serve as energy stores for the plant - and eventually, provides energy to anything that eats the plant.\n\nPlants also obviously store water, vitamins, minerals, etc. as do animals. To get a better answer you'd have to define the question better.\n\nPlants should not be stored in closets. Store where there's light. :)
970586
To add to Diamond's explanation, remember the food chain that you learned about in lower school?  Small animals eat plants.  Larger animals eat smaller animals and so on and so forth until the top of the food chain dies and decays back into the soil to be used in the growth of new plants.  But the plants need sunlight to live by way of photosynthesis.  And that light comes from the sun of course.\nSo in addition to the heating of the earth and being the engine that powers our weather (which distributes liquid water--another thing plants need--all over the planet) the sun also sustains the cycle of life and the food chain.
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Carbon dioxide, because that is the raw material required for photosynthesis
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sunlight.\n\nPlants capture energy from sunlight, animals eat plants... or other animals that have eaten plants.\n\nAloha
694083
1. Energy production and storage\n2. Structure.\n3. Supply carbon for synthesis\n4. Cell identification.
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Basically the body derives energy by stripping electrons off the food you eat and using those electrons to generate a tiny electrical charge to run the tiny electric pumps that keep you alive and moving. Animal cells are essentially just tiny electrochemical motors.\n\nThe catch is that those stripped electrons have to go somewhere, they have to be moved to a lower energy state and disposed of in order to derive that energy. Oxygen is ideal for disposing of electrons because it is extremely electron hungry. It will accept electrons from almost anything. Because of that electron affinity we can take the electrons we strip off food run them down to a very low energy state, sucking almost all the energy from them, and then we can dump them onto oxygen which still accepts them. In comparison other elements are pretty lousy electron acceptors. Once the electrons cease being very high energy those other compounds simply won’t accept them. As a result running anaerobically requires that the electrons be disposed of while they still have a lot of energy in them, so the organism gets less usable energy for each calorie eaten.\n\nYou might compare it to a battery recycler. One place will accept batteries for disposal that are totally dead and another will only accept batteries if they have a few hours life left in them. Obviously the place that will accept the dead batteries will be more efficient to use. Oxygen vs. other electron acceptors is very much like that. Oxygen allows us to suck every last little bit of juice out of our food, other electron acceptors require us to discard the food with quite a bit of potentially usable juice left.
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Food chains describe the feeding relationships in a biotic community. It is also called the energy chain because it describes the flow of energy and material from one species to another ie from plants to animals.\n\nA food chain describes a simple flow of material. It starts with the plant and algae who convert energy from the sun and ends with a top predator. For the Arctic or Southern ocean, a food chain may run as follows: Plankton-Copepod (small animal that feeds on plankton-fish-squid-orca.\n\nBecause energy is lost at each level, the number of levels in the chain does not normally exceed four or five. In overpopulated areas, people often cut one step from the food chain by eating grains themselves rather than feeding them to livestock. This increases the amount of food available. The loss of energy also explains why there are more plants and algae than herbivres and more herbivores than carnivores.\n\nThe food chain often doesn't reflect the complex relationships within an ecosystem. In reality, you have a complex flow of relationships. To reflect this, you have a food web or foot network that shows a complex flow of relationships. (I assume this is what you mean by a food pyramid which is normally related to human diet).\n\nGood luck with the report.
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None of these answers are correct for all food chains.  "D" would seem to be the best answer, but it is not always true.  It always depends on the ecosystem.  In most cases, producers will outnumber the consumers.  But not always.  For example, in a forest ecosystem a single large producer (oak tree or whatever) may support thousands of caterpillar and hundreds of  consumers like spiders and birds. If you have to pick one, pick D. Just know that it is not always true.
21156
The quantity and quality of a resource is determined by whether it is a renewable, non-renewable, or a flow resource. \n\nRenewable resources, such as plants and animals, can replenish themselves after they have been used if their physical environment has not been destroyed. If trees are harvested carefully, a new forest will grow to replace the one that was cut. If animals eat grass in a pasture to a certain level, grass will grow again and provide food for animals in the future, as long as the carrying capacity of the land is not exceeded by the pressure of too many animals. \n\nNonrenewable resources, such as minerals and fossil fuels (coal, oil, and natural gas), can be extracted and used only once. \n\nFlow resources, such as water, wind, and sunlight, are neither renewable nor nonrenewable because they must be used as, when, and where they occur. The energy in a river can be used to generate electricity, which can be transmitted over great distances. However, that energy must be captured by turbines as the water flows past or it will be lost.
1017366
about food chain.....food chains shows the interrelationship of the members of the ecosystem. mostly, food chains starts with a producer...mostly, producers are plants. then next the consumer. if there are 3 consumers listed, the 1st consumer will be thw 1st order consumer, the second is 2nd order consumer. so on and so forth. example of this is this chain: grains->rat->cat->vulture->decomposers. in this situation, the grains will be the producer, then the rat will be the 1st order consumer, the cat is the 2nd then the third will be the 3rd. mostly, the decomposers could not be included in the chain but still, if you will focus it, it is also a member of all the chains.
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Energy comes in a variety of forms: light, heat, motion, electricity, and so forth. The energy in food is measured in units of Calories. A Calorie is defined as the quantity of heat it takes to raise the temperature of 1 kg of water 1 degree Celsius. The energy in food is defined in terms of heat because the quantity measured is heat produced upon burning the food. Burning in the presence of oxygen is the process of combustion. Complete combustion results in the production of energy as well as carbon dioxide and water. Look for evidence of these products during your discovery session.\n\n\nFood often is labeled with the number of available Calories per gram of food. In this discovery session, you will measure the amount of energy in Calories in two types of nuts: peanuts and almonds. The accepted values for these nuts are listed in many Calorie-counting and diet books (5.18 Cal/gram for peanuts and 5.47 Cal/gram for almonds). This energy is converted into a usable form by chemical reactions in the human body. Therefore, the number of equivalent Calories of food that you eat gives an indication of the amount of energy you will have at your disposal.\n\nQUESTION: How are calories measured? \n\n\n\nANSWER: The caloric value of food is the energy produced by combustion of its proteins, carbohydrates and fats. The amount of energy liberated by the catabolism of food in the body is almost the same as the amount liberated when food is burnt outside the body. The energy liberated by catabolic processes is used for maintaining body functions namely digestion, thermoregulation, muscular contraction and nerve impulses conduction. The amount of energy liberated / unit time is the metabolic rate. When food is burnt outside the body, all the energy is liberated as heat. \n\nThe standard unit of heat energy is the calorie (cal), which is defined as the amount of heat energy necessary to raise the temperature of 1 ml of water by one degree, from 15 to 16 celsius at rest. \n\nA slightly different calorie is used in engineering, the international calorie, which equals 1/860 international watt-hour (4.1868 J). A large calorie, or kilocalorie, usually referred to simply as a calorie and sometimes as a kilogram calorie, equals 1,000 calories and is the unit used to express the energy-producing value of food in the calculation of diets. \n\nThe energy released by combustion of foodstuffs outside the body can be measured directly and indirectly. In direct calorimetry method the liberated energy can be measured using a bomb calorimeter. It is a metal vessel surrounded by a water insulated container. The food is ignited by an electric spark. The change in the temperature of water is a measure of the calories produced. \n\nIn indirect method, the energy production can also be calculated by measuring the amount of oxygen consumed for combustion of food. The amount of oxygen consumed / unit of time is proportionate to the energy liberated. This method of energy estimation is called wet combustion. The caloric value of carbohydrate is 4.1 Kcal /g, protein is 5.65 Kcal/ g and fat is 9.4 Kcal/g.
77966
autotrophs are organisms that produce their own food as energy source. the most common one are plants. they are the producers and are at the bottom of the food chain. they serve as an energy source for lots of organisms. think plants are consumed by herbivores (cows, sheep etc)which in turn are consumed by omnivores (humans) and carnivores (lions, tigers). abundance of autotrophs allows the increase in growth of other organisms. now if more organisms are present, they will be competing for resources which would eventually lead to the decline of autotrophs. thus sustainability is the interplay between the populations of organisms. we are just too interconnected. what one population does, affects many others.
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ummm everybody seems to have the same answer but yeah\nim assuming your in gr......7 science?\njust cause thats what i am referring to right now in my head:\n\na producer: like a plant/ something that makes its own food[bottom of food chain]\n\nconsumer: an animal/ something that need food by eating something else.\nthere are a bunch of types of producers but i dont remember the names cuz it was too long ago i think it was...so i will number them\n1: 2nd lowest it only eats plants\n2: eats plants and things that eat plants [3rd lowest]\n3: things that eat plants and animals that eat plant/ plants and animals.[highest/us!]\n\nif 1 animal were to lose its habitat, the plant eater would have no food and it would die and then the 2 woulod be able to eat nothing and the 3 would be able to eat nothing cuz the animals and the plants died. its an ecosystem...ect.....symbiosism....ect..\n\nand included in that test should be some stuff about decomposition or something like that\n..\n..\nand some stuff about \nmutualism; when 2 things are benifiting \nex: the sharks and the suckers\n\n__________.[i forgot]; when i thing benifits but the other is not harmed\nex: i cant think of one right now...but it exsists!\n\nparasitism; when i thing benifits and the other is harmed\nex: a tapeworm in a human\n\nendnote: ppl will see this answer and answer it better based on my answer so *cough*i think i should get best answer*endcough* and i totaly am just typing this out of my brain what i learnt 2 years ago so i dont remember much ^_^"""