Which one of the following choices is a fibrous protein that is responsible for strong hair and nails? a. collagen b. keratin c. estrogen d. motor protein

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Jim and phil are changing the oil in jim’s car. jim is trying to remember all the actions involved in changing the oil. phil is trying to remember the first time he ever changed the oil in his car. jim is trying to recall a memory and phil is trying to recall a(n) memory.

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