What is a threshold in terms of biology? ?
what does it mean by absolute threshold and difference threshold?

The threshold in biology is explained in terms of neuroscience or action potential that affects nervous system.

The threshold value is the value that identifies incoming signals that should be sufficient enough to generate an action potential. The potentials generated by the signals are additive, and reaches threshold depends on their amplitude and frequency.

An absolute threshold is defined as the minimum level of signals like light, touch or sound , detected by any organism and allows them to react.

While Difference threshold allow to detect difference between two different signals.

wha is what i will use to get my free points

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