Kungani izitshalo ziluhlaza?
Umbala oluhlaza uvela ekubonakalisweni kokukhanya emangqamuzaneni esitshalo. Amangqamuzana ezitshalo agcwele amakhemikhali enza i - photosynthesis abizwa ngokuthi i - chlorophyll abonisa umbala oluhlaza. Nokho, akuzona zonke izitshalo ezibukeka ziluhlaza, ngenxa yekhono lazo lokubonakalisa ezinye ubude bamaza okukhanya. Lapho izitshalo zilahlekelwa i - chlorophyll ziyoba nomkhuba wokulahlekelwa umbala wazo oluhlaza. Yingakho izitshalo zilahlekelwa umbala wazo oluhlaza ekwindla bese ziphenduka zibe bomvu, i - orange, neziphuzi.