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Why do crustaceans have hard skin and mollusks have hard shells?
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What is a crustaceans skin like?
Crustaceans are animals that live in the Ocean. Their skin, is their outer-shell of a body, so it would be hard and thick.
Do amphibians have moist skin and lay eggs without shells?
Yes, but they still have shells. Their shells are just a moist material instead of a hard one.
How long do you have to separate hermit crabs after they molt?
Never, they hide in their shells until their skin is hard.
Is a mollusk with a shell a vertebrate?
A lobster is a crustacean. Crustaceans are a type of Arthropod which is an invertebrate. Crustaceans have a hard, external shell which protect their bodies. Crustaceans have a head and abdomen. The head of a crustacean has antennae which are part of their sensory system. The abdomen includes the heart, digestive system and reproductive system. The abdomen also has appendages, such as legs, for crawling and swimming. Many crustaceans also have claws that help with crawling and eating.
How can animal grow such crustaceans when they covered with hard unstretchable skeleton?
Crustaceans like crabs shed their exoskeleton like insects and arachnids. Once they leave their protective shell, they are vulnerable because their new skin is soft. After an hour or so (depending on the species) the soft skin hardens and becomes the new exoskeleton.
Do woodlice shed skin?
They curl up into a ball, exposing only their hard outer shells.
What is the skin on peanuts called?
Shells
How do lobsters get there food?
This is from wikipedia: Lobsters are omnivores, and typically eat live prey such as fish, mollusks, other crustaceans, worms, and some plant life. They scavenge if necessary, and may resort to cannibalism in captivity; however, this has not been observed in the wild. Although lobster skin has been found in lobster stomachs, this is because lobsters eat their shed skin after molting.[4]
How would taking in water or air before a new exoskeleton hardens help an arthropod?
Arthropod means "jointed legs," because arthropods are covered with a hard skin ("crab shells" are the hard skin of crabs) and they move by flexing joints along their hard skin. When they grow, they have to grow inside their hard skin. But, if the skin is too tight, there's no space! By taking in air or water when their shell is still soft, arthropods can "pump up" and make a nice roomy shell to grow in. When they fill that shell up, they crawl out of it, and then pump up the soft skin underneath. The pumped up soft skin hardens into hard skin, and the arthropod is ready to keep growing.
What do turtles do when they get to large for there shells?
turtles never get too large for a shell,the shells grows with them the shell is part if there skin
How do crabs grow?
Crabs grow out of their shells and they also shed their skin to do that. Meaning they molt their skin.
Why do crayfish shed their skin?
Crayfish shed their shells because they are growing. they do not shed their skin, but rather the inflexible shell on top. Because it is inflexible, it cannot grow with the crayfish and they have to make new ones. Replacing a shell is called "molting". crayfish and other crustaceans molt more when they are young and are growing faster. Hope this helps!
