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Ways organisms compete

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Colleen Wayman

on 22 October 2012

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Transcript of Ways organisms compete

Review A certain role a population plays is called a ..... niche All the populations of organisms living together in an environment make up a community Shows how consumers are connected to each other according to what they eat Food Chain First level consumers eat producers and are called... herbivores These are consumers that break down the tissues of dead organisms decomposers Ways in which organisms compete Food is a resource and animals have different ways of getting their resources There are limited supplies of resources in most ecosystems so there may be competition, or a contest, among organisms for those resources Body color helps keep some animals nearly invisible to predators Animals also compete for water and shelter Plants compete for water and sunlight Every organism has adaptations to help them compete For example, a cheetah's speed allows it to hunt and capture prey, like zebra and antelopes. However, hyenas hunt in large packs and can chase away one cheetah to eat the prey on their own. Both compete for the same thing but win often enough to survive. In some communities animals live together and share resources For example, three different kinds of warblers may live in the same tree. They all feed on insects but don't compete for food because one kind will feed at the top, another at the middle, and another near the lower branches. Brainpop A long-term relationship between different kinds of organisms is called symbiosis Symbiosis may benefit both organisms, or it may benefit one organism but not the other. A relationship where both organisms benefit is called mutualism An instinct is a behavior that an organism inherits They are behaviors shared by an entire population, or by all males or all females in a population Examples: building shelters, finding mates, and hunting prey Learned behaviors are behaviors that animals learn from their parents, not inherited. Example: Lions are born with the instinct to kill and eat other animals but they must learn hunting skills from adult lions.
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