study. f(x) = bla bla bla equal to zero? maximum or minimum value.. variance. kena ulang balik neh, lupa banyak dah.
homeostasis is the process which regulates physical and chemical factors in the internal environment through negative feedback mechanism. bila air dalam badan kita banyak, blood osmotic pressure decreases. urine output pula akan naik, kan? hehe
sudah. karang teralit.
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