Affect is a psychological term for an observable expression of emotion. A person's affect is the expression of emotion or feelings displayed to others through facial expressions, hand gestures, voice tone, and other emotional signs such as laughter or tears. Individual affect fluctuates according to emotional state.
There are over 3,000 different species of cockroaches-some are considered pests while others are beneficial in their natural environment. The three main types of cockroaches commonly found in homes in South Africa include the German cockroach, Oriental cockroach and American cockroach.
Africa has some of the most dangerous and venomous snakes in the world. Get your facts and information about the Black Mamba, Boomslang, Puff Adder, Gaboon Viper, Egyptian Cobra and more of Africa's deadly snakes.Find out what the different types of snake venom will do to the victims body.enomous snakes will often avoid humans, and if they bite they rarely inject their full venom load. 18161462@N00/Flickr/CC BY 2.0. The Black Mamba (Dendroaspis polylepis) is one of Africa's most dangerous snakes and feared in East, Central and Southern Africa.