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5 days ago · parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism. The life cycle of the hard tick Ixodes scapularis, a carrier of the bacterium that causes Lyme disease in humans, requires two years for completion.
- The Editors of Encyclopaedia Britannica
May 20, 2024 · Parasitism. A fish parasite, the isopod Cymothoa exigua, replacing the tongue of a Lithognathus. Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. [1]
May 20, 2024 · Soon after parasitism, bracovirus infects host hemocytes (9), and genes encoded on viral DNAs are used to produce virulence proteins for host manipulation. When eggs hatch, the serosal membrane underlying the egg shell dissociates to liberate teratocyte cells (10) into the host hemolymph.
May 24, 2024 · Symbiosis, any of several living arrangements between members of two different species, including mutualism, commensalism, and parasitism. Both positive (beneficial) and negative (unfavorable to harmful) associations are therefore included, and the members are called symbionts.
- The Editors of Encyclopaedia Britannica
May 23, 2024 · Journal information: Current Biology. Members of the vertebrate group including anglerfish are unique in possessing a characteristic known as sexual parasitism, in which males temporarily attach ...
May 23, 2024 · “ Sexual parasitism is thought to be advantageous to inhabiting the deep sea, which is Earth’s largest and most homogonous habitat,” he said. “Once individuals find a mate in that vast expanse, obligate sexual parasitism allows them to permanently latch, which seems to be a critical aid to the evolution of deep-sea anglerfish.”
- DictionaryPar·a·sit·ism/ˈperəsəˌtiz(ə)m/
noun
- 1. the practice of living as a parasite in or on another organism: "the study of nest parasitism by cuckoos"
- 2. habitual reliance on or exploitation of others: derogatory "billionaires whose wealth is bound up with parasitism, corruption and criminality"
May 17, 2024 · General features. Fleas are small, wingless insects with a tough cuticle bearing many bristles and frequently combs (ctenidia) of broad, flattened spines. The adult flea varies from about 0.1 to 0.32 cm (0.039 to 0.13 inch) in length and feeds exclusively on the blood of mammals (including humans) and birds.
