Organisms evolved 550 Ma to form shells. when the Conditions were right for formation of shells.
Cephalopods such as octopuses, squid, and cuttlefish do not have shells. They have evolved with a reduced internal or external shell, or in some cases, no shell at all. This allows for greater agility and flexibility in movement.
With skin and egg shells able to retain water, reptiles could remain out of water indefinitely, unlike their amphibian ancestors. Mammals and dinosaurs (from which birds evolved) later evolved from reptiles.
Sea creatures with shells have evolved various adaptations to protect themselves from predators in their marine environment. These adaptations include hard shells that provide physical protection, camouflage to blend in with their surroundings, and the ability to retreat into their shells when threatened. Some species also have spines or other deterrents to ward off potential predators. Overall, these adaptations help sea creatures with shells survive and thrive in their underwater habitats.
The collective nouns for shells are:a broadside of shells (artillery)a salvo of shells (artillery)a midden of shells (sea)
Shells are not named "Hebrew." They are named "Shells."
The spiky outer shell of a conker is known as a husk. Its purpose is to deter animals from eating or damaging the seed (conker) inside. The smooth conker shells are typically found in varieties that have evolved to have a thinner, smoother husk for seed dispersal through rolling rather than dispersal by animals.
snails shed their shells and find new shells
there not ment for shells
Paper nautilus, conch shell, whelk shells, british pearl shells, and scallop shells. :)
When you open it then go to get more shells then get shells for free. This is the easiest way to get shells
they live in the shells.
No, shells are biomaterial, not rocks.