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because they have some specialities to which they can only survive in the water such as they begin their lives as free swimming bilaterally symmetrical larvae etc.for e.g:star fish,sand dollar,sea-cucumber etc.
Because they did not come to land. First one to come to land are amphibians but they are going to water for reproduction. Reptiles are the first form to fully adapt for terrestial environment.
What else can I help you with?
Do echinoderms live in salt water?
Yes Eventually echinoderms do live in water.
how do lower chordates survive on their adaptive features?
echinoderms, cnidaria and other forms
Why can some animals that live on land not live in water?
There are a number of different reasons why an animal that lives on land may be unable to live in water. The main reason is that their bodies are not adapted to such an environment, rendering them unable to survive in those conditions.Other reasons may include:Being unable to hunt or consume water-dwelling creatures.Being unable to swim for long enough periods of time (if at all).Being unable to breath sustainably when swimming.
How can echinoderms survive without a head?
Echinoderms have all the same organs as are normally found concentrated in the head only they have them scattered. So what if their eyes are on their legs if they still see. It is the seeing that is important, not the location of the eyes.
Are echinoderms heterotrophs or autotrophs?
Echinoderms, like all animals, are heterotrophs and need to eat food to survive.
How can plants survive in land?
Plants survive in land by the water
The first land animals belong to which group A arthropods B echinoderms C mollusks D vertebrates?
A. Arthropods
What kingdom are echinoderms in?
Echinoderms are in the Animalia kingdom.
What is the scientific name for Echinoderms?
The scientific name for Echinoderms is Echinodermata.
How do the changes of metamorphosis allow a frog to survive on land?
It can survive on land because it has lungs now.
How do change of metamorphosis allow a frog to survive on land?
It can survive on land because it has lungs now.
What phylum do echinoderms belong to?
Echinoderms belong to the phylum Echinodermata.
