A is a collection of ecosystems that are found in a variety of locations but they share similar characteristics and adaptations.

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A Biome is a collection of ecosystems that are found in a variety of locations but they share similar characteristics and adaptations.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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