Asmall group of friends that will ignore others, focusing only on themselves, is known as a

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms