I think b, because it’s the time that the isotope takes to fall to half of its original value
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Strands of hair originate in an epidermal penetration of the dermis called the hair follicle. The hair shaft is the part of the hair not anchored to the follicle, and much of this is exposed at the skin’s surface. The rest of the hair, which is anchored in the follicle, lies below the surface of the skin and is referred to as the hair root. The hair root ends deep in the dermis at the hair bulb, and includes a layer of mitotically active basal cells called the hair matrix. The hair bulb surrounds the hair papilla, which is made of connective tissue and contains blood capillaries and nerve endings from the dermis.
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Answer:
Humans have to breathe continously even when you sleep because your body needs oxygen constantly. your body does not stop working when you sleep.
Explanation:
plz mark brainliest i just need 2 more until expert
Waste is buried deep in the glacier but rides downhill and will eventually melt out. Beginning in 2007, removal of human waste via Clean Mountain Cans
