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The eyespot apparatus (or stigma) is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids. It allows the cells to sense light direction and intensity and respond to it, prompting the organism to either swim towards the light (positive phototaxis ...
An eyespot (sometimes ocellus) is an eye-like marking. They are found in butterflies, reptiles, cats, birds and fish. Eyespots could be explained in at least three different ways. They may be a form of mimicry in which a spot on the body of an animal resembles an eye of a different animal, to deceive potential predator or prey species.
Eyespot (mimicry), a color mark that looks somewhat like an eye; Eyespot, a sensory organ of invertebrates; see simple eye in invertebrates; Eyespot, a type of eye in some gastropods, a part of sensory organs of gastropods; Eyespot apparatus, a photoreceptive organelle found in the flagellate (motile) cells unicellular photosynthetic organisms
Many insects including hoverflies (C, D, E) and the wasp beetle (F) are Batesian mimics of stinging wasps (A, B), which are Müllerian mimics of each other.. In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species.
Synodontis longirostris, known as the eyespot synodontis, [2] is a species of upside-down catfish that is native to the Democratic Republic of the Congo where it occurs in the Congo Basin. [3] It was first described by British-Belgian zoologist George Albert Boulenger in 1902, from specimens obtained in the Ubangi River at Banzyville . [ 2 ]
Currently the gene conferring resistance to eyespot is the Pch1 gene. To generate resistant culitvars plants containing this gene are bred with others to pass the gene to their offspring. [5] Crop rotation is also important in reducing the extent of disease because eyespot fungi live on debris of the previous crop. Cropping the wheat with ...
Head of Polistes with two compound eyes and three ocelli (circled). A simple eye or ocellus (sometimes called a pigment pit [1] [2]) is a form of eye or an optical arrangement which has a single lens without the sort of elaborate retina that occurs in most vertebrates.
Dichotomyctere ocellatus (syn. Tetraodon biocellatus), commonly the figure 8 puffer or eyespot puffer, is a pufferfish found in freshwater [clarification needed] in Southeast Asia. It is known from the lower reaches of the Mekong (Cambodia), the Peninsular Malaysia as well as Borneo ( Sarawak , Kalimantan ).