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In the unified model of active galaxies,the main difference among quasars,BL Lacertae objects,and radio galaxies appears to be that:
Arrector Pili Muscles
Small muscles connected to hair follicles that, when contracted, cause hair to stand on end, known as "goosebumps."
Ultraviolet Light Rays
A form of electromagnetic radiation with a wavelength shorter than that of visible light, known for its ability to induce suntans and sunburn.
Subcutaneous Tissue
A layer of tissue that lies underneath the dermis of the skin, consisting of fat and connective tissues that house larger blood vessels and nerves.
Sebaceous Glands
Glands located in the skin that secrete an oily substance called sebum, involved in lubricating skin and hair.
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