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Salamanders, caecilians and some frogs have one or two rows of teeth in both jaws, but some frogs (Rana spp.) lack teeth in the lower jaw, and toads (Bufo spp.) have no teeth. In many amphibians there are also vomerine teeth attached to a facial bone in the roof of the mouth. [144] Edible frog (Pelophylax esculentus) exhibiting cannibalism
This is not uncommon in fish that inhabit waters high in CO 2. [113] According to one hypothesis, the "sculpted" or "ornamented" dermal skull roof bones found in early tetrapods may have been related to a mechanism for relieving respiratory acidosis (acidic blood caused by excess CO 2) through compensatory metabolic alkalosis. [114]
Most animals have ground reaction forces (GRFs) at around two to three times their body weight per limb. But digitigrades have a higher GRF than other animals due to the increased weight on a smaller surface area, which would be about six times their body weight per limb. [9] Toe tufts are commonly found on cats with medium to long coats.
Many species of snakes wiggle their tails as a lure to attract prey, who may mistake the tail as a worm. The extinct armored dinosaurs (stegosaurs and ankylosaurs) have tails with spikes or clubs as defensive weapons against predators. Tails are also used for communication and signalling. Most canines use their tails to communicate mood and ...
Among the early synapsids, only two species of small varanopids have been found to possess osteoderms; [27] fossilized rows of osteoderms indicate bony armour on the neck and back. However, some recent studies have cast doubt on the placement of Varanopidae in Synapsida, [ 28 ] [ 29 ] while others have countered and lean towards this ...
Image credits: jjky665678 It turns out that cats have their own analogue of a smile - they simply blink slowly when they look at their owners. And scientists who have studied thousands of cat ...
Well, many cat owners know the classic tell-tale signs of a happy cat: purring, rubbing against a human's legs and feet, kneading, meowing, or asking for attention with a touch of their paw. You ...
Per reports, it is rare for a biological male Calico Cats to have two chromosomes, as only 1 in every 3,000 has XXY chromosomes. As such, Josie is indeed a very special cat. As such, Josie is ...