What is the main idea of operant conditioning?

2.4 Bhala ubulili obubili ngesiZulu esibuthola kulekhathuni. Bese ubhala obakho. (2)

Which two neurotransmitters have roles in appetite suppression?

5.2 Bhala imisho elula emithathu. Imusho wakho ngamunye mawube nomenzi, nesenzo, nomenziwa. (6)

2.1 ‘n Dier wat NIE in die oseaan-habitat aangetref word nie:  (1)

Which term describes the tendency to maintain a balance, or optimal level, within a biological system?

In order to maximize the chances that experimental groups represent the population of interest, researchers should conduct ________ and ________.

2.5 Laba bantu abasesithombeni bawubulili (gender).Khetha impendulo kubakaki (Abesilisa,abesifazane,abesilisa nabesifazane). (2)

1.2.4 Khipha impindwa enkondlweni bese uyasho ukuthi yini msebenzi wayo. (3)

1.4 Spiere is die enigste strukture in die menslike liggaam wat bene bymekaar hou.  (1)