Squirting cucumber: Squirting cucumber, (Ecballium elaterium), trailing herbaceous plant in the gourd family (Cucurbitaceae). The plant is native to the Mediterranean region but has been introduced to other areas as a garden …
Convergent evolution : the independent evolution of similar features in unrelated organisms, as a result of their being exposed to similar selection pressures e.g. dolphins, sharks and ichthyosaurs show convergent evolution in body form.
In fruits such as Impatiens parviflora, Oxalia acetosella and Ecballium elaterium, turgor pressure is the method by which seeds are dispersed. In Ecballium elaterium, or squirting cucumber, turgor pressure builds up in the fruit to the point that aggressively detaches from the stalk, and seeds and water are squirted everywhere as the fruit
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Osmoconformers and Osmoregulators Not all organisms osmoregulate. Some marine s such as the sea stars are osmoconformers; their body fluids are similar to seawater in osmolarity, so they gain and lose water at equal rates and have no need to expend energy expelling water or salt from the body.
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HOW CORAL REEFS GROW Old coral reefs may be over 30 meters (98 feet) thick, but the living part is only a thin veneer of corals and other organisms, perhaps only a meter (about 3 feet) thick on the surface.
In evolutionary biology, parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.