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nutrients are a source of energy for living things
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a human is a kind of organism
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a human is a kind of living thing
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food contains nutrients
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a living thing requires energy to grow and heal
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food contains nutrients for living things
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living things eat their food source
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nutrients are a source of energy for living things
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an animal is a kind of living thing
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food contains nutrients for living things
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nutrients are a source of energy for living things
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as the amount of available water decreases , tree-growth rings will become narrower
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if something causes something else then the result of that something else indicate the properties of that something
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width is a property of size / shape and includes ordered values of narrow / wide
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dry environments result in narrow tree-growth rings
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a tree growing a tree-growth ring occurs once per year
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living things require water for survival
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a dry environment is low in availability of water
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water is a kind of natural resource
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when available resources decrease in an environment , organisms have to conserve those resources
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a desert environment is a dry environment
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spring has warm temperatures / weather
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an animal being born when temperatures are warm has a positive impact on that animal 's survival
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spring increases the amount of available food in an environment
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an animal being born when food is available has a positive impact on that animal 's survival
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convergent evolution is when two species in different taxonomic families develop in different places under similar environmental pressures
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if two things are thousands of miles apart then those two things are separate from each other
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the opposite of the same is different
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two birds are not in the same taxonomic family
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a bird is a kind of organism
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two birds live in environments with similar characteristics
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two birds developed thousands of miles apart
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a species is a group of a certain kind of organism
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environments with similar characteristics place similar environmental pressures on the organisms in them
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seasons cause change to the environment
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usually plants die or become dormant during the winter
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eating food is used to get nutrients by animals
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if an animal relies on plants for food then that animal must store enough food to last through the winter
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plants are a source of food for animals
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an animal requires enough nutrients to survive
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a squirrel is a kind of animal
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nut is a kind of food
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winter is a kind of season
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an example of preparing is storing something for use later
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some animals have offspring by laying eggs
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as number of organisms in a group increases , the chance of survival of each organism will increase
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offspring are a kind of group of organisms
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howling is a kind of sound
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sound can be used for communication by animals
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animals usually keep away from danger or problems
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warning can be used to indicate danger or problems
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a wolf is a kind of animal
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a warning is used to warn animals
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warning is a kind of communication
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establishing a territory requires keeping other animals away
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an animal requires warmth for survival
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birds fly south for the winter
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migration is when animals move themselves from a cooler climate to a warmer climate for the winter
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winter means environmental temperature decreases
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winter has cold temperatures
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temperature is a property of the environment
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birds fly south for the winter
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an animal requires warmth for survival
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migration is when animals move themselves from a cooler climate to a warmer climate for the winter
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climate means the average temperature / weather in an area
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migration is when animals move themselves from a cooler climate to a warmer climate for the winter
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an animal requires warmth for survival
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some birds fly south for the winter
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winter has cold temperatures / weather
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migration is a kind of adaptation
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an instinctive behavior is a kind of behavioral adaptation
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migrating is an instinctive behavior
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winter has cold temperatures
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cold environments usually have little food for animals
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temperature is a property of the environment
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animals require food to survive
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a warm environment usually has more food than a cold environment
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an instinctive behavior is a kind of behavioral adaptation
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migrating is an instinctive behavior
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young animals are born as a result of reproduction
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a bird is a kind of animal
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nest building is a kind of adaptation
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adaptation has a positive impact on the survival of a species
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many birds reproduce during spring
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a nest is a kind of resource for a bird
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birds build nests in the spring
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a nest is used for protecting young by birds
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behavioral adaptation has a positive impact on the population / the survival / the reproduction of a species / of individual organisms
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a behavior is a kind of characteristic
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something that animals require has a positive impact on that animal's survival
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an instinctive behavior is a kind of behavioral adaptation
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an instinctive behavior is a kind of inherited characteristic
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ash from a volcano is warm in temperature
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animals require warmth for survival
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an example of an inherited behavior is a bird building a nest
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a volcano changes the environment around it by covering the environment in ash
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an animal needs to attract a mate to reproduce
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coloration can be used for communication by animals
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in order to attract a mate, an animal must let other animal know that it is a potential mate
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an adaptation has a positive impact on an animal 's ability to reproduce
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