Questions and Answers. What is the simplest way of explaining what atoms, elements, compounds and mixtures are? Atoms are the smallest bits of ordinary matter and are made from particles called protons (which carry a positive electrical charge), neutrons (which carry no electrical charge) and electrons (which carry a negative electrical charge).
A compound eye may consist of thousands of individual photoreceptor units or ommatidia (ommatidium, singular). The image perceived is a combination of inputs from the numerous ommatidia (individual eye units), which are located on a convex surface, thus pointing in slightly different directions.he eye of a red-tailed hawk. Visual acuity, or resolving power, is the ability to distinguish fine detail and is the property of cone cells. It is often measured in cycles per degree (CPD), which measures an angular resolution, or how much an eye can differentiate one object from another in terms of visual angles.
Rods are a part of the eye that takes in low light. Cones are  located in the retina and they are responsible for seeing in color.  All mammals have rods and cones in their â¦ eyes. 1 person found this useful.