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A dragonfly in its radical final moult, metamorphosing from an aquatic nymph to a winged adult.. In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in ...
Birds cannot use their beaks to apply preen oil to their own heads. Instead, many use their feet in an action called scratch-preening. Once they have gathered preen oil on their beak, they scrape a foot across their bill to transfer the oil, and then scratch the oil into the feathers on their head. [28] Longer-necked birds may rub their head ...
The term "horn" is also popularly applied to other hard and pointed features attached to the head of animals in various other families: Giraffidae: Giraffes have one or more pairs of bony bumps on their heads, called ossicones. These are covered with furred skin. Cervidae: Most deer have antlers, which are not true horns and made of bone.
Their venom is a complex mixture of toxins, some fast-acting and others slower but deadlier. [ 117 ] [ 113 ] [ 118 ] The effects of individual cone-shell toxins on victims' nervous systems are so precise as to be useful tools for research in neurology , and the small size of their molecules makes it easy to synthesize them.
In many cases the cast skin peels backward over the body from head to tail, in one piece like an old sock. A new, larger, and brighter layer of skin has formed underneath. [5] [7] An older snake may shed its skin only once or twice a year, but a younger snake that is still growing may shed up to four times a year. [7]
The real reason is actually so much more adorable than this. According to Mental Floss: %shareLinks-quote="Dogs are impressively good at reading and responding to our body language and vocal cues."
[8] [12] Their bodies are covered by a cuticle (outer covering) that does not contain cells but is secreted by cells in the skin underneath, is made of tough but flexible collagen [8] and does not molt [23] – on the other hand arthropods' cuticles are made of the more rigid α-chitin, [8] [24] and molt until the arthropods reach their full ...
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