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The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism. [3] Scyphozoans have existed from the earliest Cambrian to the ...
The bell width is usually between 25 cm and 1 m [6] Their oral arms usually have a base that is not thickened, between 17-24 shallow coronal muscle folds, and no pits in their muscle folds [4] Cyanea annaskala are endemic to the waters of South Eastern Australia, spanning depths from shallow waters close to the shore to 20 m below the surface.
The polyps of these jellyfish can grow to 1.6 cm (0.63 in) tall and their ephyrae have an average diameter of 0.4 cm (0.16 in). [13] The adult medusae are typically translucent in color [ 13 ] but the color of their gut can change based on what they eat; for example, if they eat crustaceans, they can have a pink or lavender tint to them and if ...
Velella is a monospecific genus of hydrozoa in the Porpitidae family. Its only known species is Velella velella, [2] a cosmopolitan (widely distributed) free-floating hydrozoan that lives on the surface of the open ocean.
In Osmia rufa, for example, the female is larger/broader than males, with males being 8–10 mm in size and females being 10–12 mm in size. [29] In the hackberry emperor females are similarly larger than males. [30] The reason for the sexual dimorphism is due to provision size mass, in which females consume more pollen than males. [31]
The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, protists, and other living organisms.This number, along with the visual appearance of the chromosome, is known as the karyotype, [1] [2] [3] and can be found by looking at the chromosomes through a microscope.
Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
On the oral side of the rhopalium near the lithocyst is a mass of sensory cells called the "pigment-cup ocellus", while on the aboral side, there is a “pigment-spot ocellus” just proximal to the lithocyst, formed by a patch of pigment cells. [1]