Repetitions and Duplications: double, triple and multiple
Say you’ve got “trout-au-bleu” (steamed/poached trout) on your plate and you dig in: no doubt you’ll notice the repetitive arrangement of the trunk musculature. Like folded serviettes, one like the other, the muscle segments (known as myomeres) are highly repetitive. —>—>
Unusual nests and places: you’d never think of this one!
Nests to shelter eggs, the young of a species and its parent(s) are constructions that are being employed by a wide range of very different animals. Nests may be made entirely from material that is produced by the nest maker alone as, for example, in spiders that spin a cocoon to house their eggs or as in anabantoid labyrinth fishes like the Siamese fighting fish and the South American catfishes of the genus Hoplosternum, which construct nests of air bubbles that these fish spit into a pile that then floats on the surface of the water.
The pouch: what a very useful structure!
By definition a “pouch” is a small sac-like container to store or keep things in. Biologically speaking, it is a pocket-like space in or on the body and the ‘pouches’ in our cheeks, for example, come to mind. They are useful for sucking up liquids (without these pouches as in the case of many carnivores like dogs and cats, liquids would have to be leapt up). —>—>