Give an example of the type of stress that a matric learner may experience during their grade 12 year for each of the following:
1.Emotional
2.Economic (2)
3.Personality-based (2)
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Does nicotine show up in a drug test when u pee in the cup

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases

Why do you need two different circuits of blood vessels in your body?