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Refer to the figure showing hooded merganser ducks. The identity of the merganser species is well-accepted, despite its sexual dimorphism.Explain what this implies for the use of morphological similarity to the biological species concept.
Synapses
The junctions through which neurons signal to each other or to other types of cells, allowing for communication within the nervous system.
Specialized Cells
Cells that have developed unique characteristics and functions through the process of differentiation.
Absolute Threshold
The minimal intensity of a stimulus that is required to be detected 50% of the time.
Difference Threshold
The smallest difference in stimulation that can be reliably detected by an observer when two stimuli are compared; also called just noticeable difference (jnd).
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