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A rook skull The rook is a very social bird; in the evenings they gather in large flocks, often in thousands. Rooks are highly gregarious birds and are generally seen in flocks of various sizes. Males and females pair-bond for life and pairs stay together within flocks.
In mammalian outer hair cells, the varying receptor potential is converted to active vibrations of the cell body. This mechanical response to electrical signals is termed somatic electromotility; [13] it drives variations in the cell's length, synchronized to the incoming sound signal, and provides mechanical amplification by feedback to the traveling wave.
The organ of Corti is lined with a single row of inner hair cells and three rows of outer hair cells. The hair cells have a hair bundle at the apical surface of the cell. The hair bundle consists of an array of actin-based stereocilia. Each stereocilium inserts as a rootlet into a dense filamentous actin mesh known as the cuticular plate ...
Horn is the outer covering of a bony outgrowth on an animal's skull, such as a cow. It consists of a mass of very hard, hair-like filaments called keratin, cemented together around a spongy internal bone core. This layering effect continues to grow over time, resulting in a cone-within-cone structure.
Hyracodon's skull was large in comparison to the rest of the body. Hyracodon's dentition resembled that of later rhinocerotoids, but it was a much smaller animal and differed very little in appearance from the primitive horses of which it was a contemporary (32–26 million years ago). It had a short, broad snout and its long, slender limbs had ...
A 13,600-year-old mastodon skull was uncovered in an Iowa creek, state officials announced this week. Iowa's Office of the State Archaeologist said in a social media post that archaeologists found ...
Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. [1] [2] [3] In colloquial English, they are known as the crow family or corvids.
“There were also some teeth still. Just a few on top in the front row,” Mejia added. “This [man was killed] recently, I’d say. Within the last year, because the skull still had a strong ...