What are the similarities between the sponge Cnidaria and echinoderm?
The main similarity between echinoderms and cnidarians is that they are aquatic animals.
What characteristics are shared by cnidarians and echinoderms?
Ex4
| Question | Answer |
|---|---|
| What is true of echinoderms? | Only A and B are true. |
| Which characteristic is shared by both cnidarians and flatworms? | a digestive system with a single opening |
| Vertebrates and tunicates share | a notochord and a dorsal, hollow nerve cord. |
Why do soft animals like sponges and cnidarians not live on land?
Why don’t soft animals like sponges and cnidarians live on land? They need water for their food supply and can’t support their body weight out of water.
Is a jellyfish an annelid?
Jellyfish, hydras, sea anemones, and corals make up the four classes of cnidarians. So, now you know why you feel so uncomfortable when a jellyfish stings you! 5. Segmented worms are also known as annelid worms.
Why can’t cnidarians live on land?
why don’t soft animals like sponges cnidarians live on land? They have no significant gravitational force on them in water because they nearly float or float. Therefore they do not get squished against the bottom of the ocean despite not having any hard structure to hold their shape.
What is a jellyfish life cycle?
Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually. Learn more about the lifecycle and reproduction of jellyfish.
Are cnidarians asexual?
All cnidarian species are capable of sexual reproduction, which occurs in only one phase of the life cycle, usually the medusa. Many cnidarians also reproduce asexually, which may occur in both phases.
How do cnidarians defend themselves?
Cnidarians defend themselves and catch prey using their tentacles, which have cells called cnidocytes at their tips.
What cnidarian is most likely to kill you?
Although the box jellyfish—species unspecified—has been called in newspapers “the world’s most venomous creature” and the deadliest creature in the sea, only a few species in the class have been confirmed to be involved in human deaths; some species are not harmful to humans, possibly delivering a sting that is no more …
How do Coelenterates defend themselves?
They are ringed with tentacles and stinging cells called nematocysts. They use these cells to hunt their prey. Also, nematocysts can be used to derive nutrition as well as for their protection.
How do cnidarians help humans?
Human uses: All kinds of corals hard and soft, sea anemones and other cnidaria are extensively harvested from the wild for the live aquarium trade. Hard coral are also mined as building materials in some coastal areas. Living coral reefs, however, are worth far more to humans when they left alone.
What is the scientific name for Hydra?
Hydra
Can you eat hydras?
The answer to that is a clear yes and no. Hydra are hunters, have cnidoblasts at the end of their tentacles to paralyze their prey (smaller crustaceans, worms, larvae and similar…), before eating them.