Examlex
A high volume of posting is an important characteristic of popular and influential blogs, but it tends to create a lot of junk.
Cone
(1) In botany, a reproductive structure in many gymnosperms that produces either microspores or megaspores. (2) In zoology, one of the conical photoreceptive cells of the retina that is particularly sensitive to bright light and, by distinguishing light of various wavelengths, mediates color vision. Compare with rod.
Compound Eye
A type of eye found in some arthropods, consisting of multiple small visual units that provide a wide field of vision and the ability to detect movement.
Camera Eye
A type of eye found in vertebrates and some mollusks that is characterized by a spherical lens that focuses light on the retina, producing a detailed image.
Ocelli Eye
Simple eyes, or ocelli, are found in some invertebrates, consisting of photoreceptor cells to detect light intensity and direction, but not form detailed images.
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