answer my homework!!!?

Question

what is the difference between a food chain and food web???!!!

Answer 1

I think a food web is a web which shows how all the food chains are interconnected.

Answer 2

A food chain describes a single pathway that energy and nutrients may follow in an ecosystem. There is one organism per trophic level, and trophic levels are therefore easily defined. They usually start with a primary producer and end with a top predator. Here is an example of a food chain:

phytoplankton → copepod → fish → squid → seal → orca
Food web

Example of a food web in an Arctic ecosystemA food web or food network extends food chain concept from a simple linear pathway to a complex network of interactions. The direct steps as shown in the food chain example above seldom reflect reality. This "web" makes it possible to show much bigger animals (like a whale) eating very small organisms (like plankton). Food sources of most species in an ecosystem are much more diverse, resulting in a complex web of relationships as shown in the figure on the right. In this figure, the grouping of Phytoplankton → Herbivorous zooplankton → Carnivorous zooplankton → Arctic char → Capelin on the far right is a food chain; the whole complex network is a food web/network.

Answer 3

A food chain is the link in which a particular species gets their nourishment from. A food chain shows how each living thing gets its food. Some animals eat plants and some animals eat other animals. For example, a simple food chain links the trees & shrubs, the giraffes (that eat trees & shrubs), and the lions (that eat the giraffes). Each link in this chain is food for the next link. A food chain always starts with plant life and ends with an animal.

Most animals are part of more than one food chain and eat more than one kind of food in order to meet their food and energy requirements. These interconnected food chains form a food web.

Answer 4

A food chain follows a single path as animals eat each other. A food web shows how many animals are connected by different paths. See the web address below.

Answer 5

A food chain is where there is a clear, linear progression of stuff that eats other stuff: animal A eats animal B, which eats animal C.

A food web is where it's not so clear: maybe animal A eats animals B and C, and maybe B and C both eat D. Often animals have choices, and can eat all sorts of different animals to survive, so it becomes more of a web than a straight chain of what eats what.

Answer 6

you have to look a little closer at how food is transferred from one level to another.

Food chains describe a linear relationship eg: Producer-Grazer-Predator, etc, showing just one example of a species at each level.

In reality, when you examine these relationships they are not linear - a predator may eat some grass (omnivore), may be eaten itself, a grazer may eat several different types of producers (plants), etc.

A food web shows these relationships between all the organisms - linking like a food chain, but more complex

Answer 7

A food chain just tells you only one way in how food is linked for example: worms ->birds ->cats (that's a food chain).

A food web is where all the food are inter-linked e.g. worms->birds ->cats

insects->birds->cats

corn ->rats->cats

Therefore, worms and insects are both eaten by birds, these are linked to birds. Rats and birds are also eaten by cats. If you draw all of these three food chains together as one diagram, you can inter-link them and create a food web.

Answer 8

FOOD WEBS show how plants and animals are connected in many ways to help them all survive. FOOD CHAINS follow just one path as animals find food.
======================
FOOD CHAINS FOLLOW A SINGLE PATH AS
ANIMALS EAT EACH OTHER.

EXAMPLE:
GRASS (is eaten by a) GRASSHOPPER (which is eaten by) a FROG (which is eaten by a) SNAKE (which is eaten by a) HAWK
=========================
FOOD WEBS SHOW HOW MANY ANIMALS ARE INTERCONNECTED BY DIFFERENT PATHS.

EXAMPLE:
TREES produce acorns which act as food for many MICE and INSECTS. Because there are many MICE, the WEASELS, SNAKES, and RACOONS, have food. The insects in the acorns also attract BIRDS, SKUNKS, and OPOSSUMS. With the SKUNKS, OPPOSUMS, WEASELS and MICE around, HAWKS, FOXES, and OWLS can find food. They are all connected!
===============

Answer 9

FOOD CHAINS FOLLOW A SINGLE PATH AS
ANIMALS EAT EACH OTHER.

EXAMPLE:
GRASS (is eaten by a) GRASSHOPPER (which is eaten by a) FROG (which is eaten by) a SNAKE (which is eaten by a) HAWK

FOOD WEBS SHOW HOW MANY ANIMALS ARE INTERCONNECTED BY DIFFERENT PATHS.

EXAMPLE:
TREES produce acorns which act as food for many MICE and INSECTS. Because there are many MICE, the WEASELS, SNAKES, and RACOONS, can find food. The insects in the acorns also attract BIRDS, SKUNKS, and OPOSSUMS. With the SKUNKS, OPPOSUMS, WEASELS and MICE around, HAWKS, FOXES, and OWLS can find food. They are all connected.

FOOD WEBS show how plants and animals are connected in many ways to help them all survive. FOOD CHAINS follow just one path as animals find food.

Answer 10

Food chains and food webs and/or food networks describe the feeding relationships between species in a biotic community. In other words, they show the transfer of material and energy from one species to another within an ecosystem.

As usually diagrammed, an organism is connected to another organism for which it is a source of food energy and material by an arrow representing the direction of biomass transfer. Organisms are grouped into trophic levels—from the Greek word for nourishment, trophikos—based on how many links they are removed from the primary producers. Primary producers, or autotrophs, are species capable of producing complex organic substances (essentially "food") from an energy source and inorganic materials. These organisms are typically photosynthetic plants, bacteria or algae, but in rare cases, like those organisms forming the base of deep-sea vent food webs, can be chemotrophic. All organisms that eat the autotrophs are called heterotrophs. They get their energy by eating the producers

food chain
A food chain describes a single pathway that energy and nutrients may follow in an ecosystem. There is one organism per trophic level, and trophic levels are therefore easily defined. They usually start with a primary producer and end with a top predator. Here is an example of a food chain:

phytoplankton → copepod → fish → squid → seal → orca
This "chain" can be described as follows: Orca (also known as "killer whales") feed upon seals, that feed upon squid, that eat small fish, that feed on copepods, that feed on microscopic algae. In this example, algae—autotrophs by virtue of their ability to photosynthesize—are the base of the food chain. It is always the case that numbers—or at least biomass—decreases from the base of the chain to the top. In other words, the number and mass of phytoplankton cells are much greater than the number and mass of copepods being supported by the phytoplankton. Viewed another way: to support one orca requires many seals, large numbers of squid, huge numbers of fish, and so on down the chain (see energy pyramid). This is because, with each transfer, some of the energy is lost to the environment. On average, only 10% of the organism's energy is passed on to its predator.

Food chains are overly simplistic as representatives of what typically happens in nature. The food chain shows only one pathway of energy and material transfer. Most consumers feed on multiple species and are, in turn, fed upon by multiple other species. The relations of detritivores and parasites are seldom adequately characterized in such chains as well

food web
A food web or food network extends food chain concept from a simple linear pathway to a complex network of interactions. The direct steps as shown in the food chain example above seldom reflect reality. This "web" makes it possible to show much bigger animals (like a whale) eating very small organisms (like plankton). Food sources of most species in an ecosystem are much more diverse, resulting in a complex web of relationships as shown in the figure on the right. In this figure, the grouping of Phytoplankton → Herbivorous zooplankton → Carnivorous zooplankton → Arctic char → Capelin on the far right is a food chain; the whole complex network is a food web/network