What is your basal metabolic rate? a. the rate at which you use energy when your body is at rest b. your heart rate c. the rate at which you breathe while performing physical activity d. the rate at which you eat?

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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he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?