Explain how both bottom-up and top-down processing are involved in the "crystal running on the beach" example.

Of the four approaches to object perception ottom-up processing than the others. Modern psychologists have suggested a connection between the Gestalt principles and past experience.Perception starts with bottom-up processing, which involves stimulation of the receptors, creating electrical signals that reach the visual receiving area of the brain. Perception also involves top-down processing, which originates in the brain.shifting attention by making eye movements. -determined by bottom-up processes such as stimulus salience and by top-down processes such as scene schemas and task demands, which influence how eye movements are directed to parts of a scene. examples of top-down processing: multiple personalities of a blob and finding faces in a landscape; how knowledge of a language makes it possible to perceive individual words; and how the perception of pain is influenced by things other than the pain stimulus

Ribonuclease activity is a type of nuclease that catalyzes the degradation of rna into small components.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.