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Ecology is the branch of biology where animals react to animals in their environment and their physical surroundings
The shark lives in the ocean and is a consumer like us. It eats fish, whale, seal etc. it lives down by the ocean floor or in the middle of the water looking for its next meal.
An individual is one animal within a group of others like it. Population is an a lot of the same species within a community or habitat.
The individual/shark interacts with their environment by eating a wide variety of fish. It is a consumer so it needs to find and eat food and by doing so it is also getting O2 from the salty water.
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Commensalism is where one organism benefits from another without hurting each other such as the shark eats and the fish on the underside of his belly eats the scraps. Mutualism is where two organisms benefits from one like a bee gets nectar, pollinates flower, and reproduction starts. Parasitism is where one organism hurts the other but still benefits itself like a flea on a dog.
Community is a variety of animals in an environment/habitat. Ecosystem is the habitat that animals live in, it includes all biotic and abiotic things.
The first one is a Protist that has a flagella and is in the Protista kingdom. The next one is of moss and is in the Plant kingdom. Third is of mushrooms or fungi and is in the Fungi kingdom. Last but not least is the seamturtle in the Animal kingdom.
Three characteristics of these four kingdoms are that only three of these are multicellular and only one is unicellular. Animal and fungi can't produce own food(heterotroph), but protist and plants can(autotroph). All of these can't survive without food.
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Since the phytoplankton are at the bottom of the food chain they are the ones that get eaten first and they produce the fastest so the animals further up the food chain can survive. Next is the zoo-plankton like shrimp that get eaten by filterers such as lantern fish and the ocean sunfish.Second to the top we have our smaller predators like the squid or mackerel.And at the very top of the food chain we have our main predators from tuna and marlin to small and big sharks.
The food chain is almost the same as the food web. It starts with crustaceans eat the phytoplankton and fish eat the crustaceans. then the predators(dolphin) eat the small fish and the killer whale eats the fish or seal if they find one.
The fish is a consumer so it gets the food/energy from the crustacea because they eat the plankton. The fish can not produce its own food so it must eat/consume it.
A producer is an organism that produces its own food, a consumer can't produce its own food so it consumes/eat it, decomposer means it breaks down dead animals or plants.
All three of these are abiotic factors such as the sea shell, rock or sand. The sea shells cover the bodies of hermit crabs or crawfish because of their soft back. The sand can be protection from predators such as the flounder can blend into the sand and because it is flat predators can't see it. Rock can also hide smaller fish so they can be safe and have a home from predators.
These organisms respond and react to there environment by having these abiotic factors for their home and for protection from predators.