What type of skeleton do echinoderms have? A) Shell, but no skeleton B) Endoskeleton C) Exoskeleton--cuticle D) Exoskeleton
Answer (1)
Echinoderms, such as starfish, sea urchins, and sea cucumbers, have an endoskeleton . Therefore, the correct multiple-choice option is B) Endoskeleton.
Here's a more detailed explanation:
What is an endoskeleton? An endoskeleton is an internal skeleton that provides structural support within the body. It is composed of mineral-rich structures that can support the body unlike an exoskeleton, which is external.
Characteristics of Echinoderm Endoskeletons:
Composition: The endoskeleton of echinoderms is made up of calcareous plates or ossicles. These are formed from calcium carbonate.
Structure: The ossicles are located just beneath the skin of the echinoderm and are connected by a network of tissues, providing flexibility and strength.
Why is this important? The endoskeleton allows echinoderms to maintain their shape while supporting their movement and body functions. It also helps protect their internal organs.
In summary, echinoderms have an endoskeleton, which is a characteristic feature distinguishing them from organisms with exoskeletons or no skeletons.
