radial symmetry
Then, which characteristic is shared by cnidarians and platyhelminthes?
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. |
Beside above, which class of the phylum Cnidaria occurs only as a polyp? Anthozoa
In this regard, which of the following are characteristics of cnidarians?
All Cnidaria are aquatic, mostly marine, organisms. They all have tentacles with stinging cells called nematocysts that they use to capture food. Cnidarians only have two body layers, the ectoderm and endoderm, separated by a jelly-like layer called the mesoglea. Most Cnidarians have radial symmetry.
What distinguishes members of phylum porifera from all other animals?
Only sponges (phylum Porifera) have asymmetrical body plans. Some animals start life with one type of body symmetry, but develop a different type as adults; for example, sea stars are classified as bilaterally symmetrical even though their adult forms are radially symmetrical.
Which phylum is characterized by animals that have a segmented body?
Arthropoda is the phylum that is characterized by segmented body. Examples of arthropods include butterflies, insects and spiders.Which type of animal symmetry produces mirror images of each other no matter how the animal is sliced longitudinally?
Sponges exhibit radial symmetry. True or False? Lophotrochozoa are animals that are organized circularly, so no matter how they are sliced in half longitudinally, mirror images are obtained.Which clade in the phylum Cnidaria includes?
The phylum Cnidaria contains about 10,000 described species divided into two monophyletic clades: the Anthozoa and the Medusozoa. The Anthozoa include the corals, sea fans, sea whips, and the sea anemones.Which phylum does the heartworm belong?
Heartworms are from a phylum of roundworms called nematodes. The scientific name for heartworms is Dirofilaria immitis.What are five characteristics of cnidarians?
Terms in this set (5) - 5 main features of cnidarians. soft bodied, carnivorus, with stinging tentacles, body symmetry, and specialized tissue.
- 3 groups of cnidarians. jellyfish, hydras (and relatives), and sea anemones and coral.
- statocyst.
- ocelli.
- human activities that hurt coral.
What are 3 characteristics of cnidarians?
Characteristics of Cnidaria:- - Radially Symmetrical.
- Body multicellular, few tissues, some organelles.
- Body contains an internal cavity and a mouth.
- Two different forms exist, medusa and polyp.
- Reproduction is asexual or sexual.
- Has a simple net like nervous system.
What is a unique characteristic of cnidarians?
Most cnidarians possess tentacles, and many also have nematocysts (specialized stinging cells). Cnidarians are characterized by the presence of three tissue layers, an outer protective epidermis, a middle layer called the mesoglea, and an inner layer called the gastrodermis, whose function is primarily digestive.What characteristic do all Scyphozoans share?
Scyphozoans share a number of attributes with other cnidarians: (1) they typically possess tentacles, (2) their symmetry is radial, (3) the body wall consists of an outer epidermis and inner gastrodermis, separated by a layer of jelly-like mesoglea, (4) the mouth is the only opening to the digestive system, (5)Do cnidarians have a brain?
Cnidaria do not have a brain or groups of nerve cells ("ganglia"). The nervous system is a decentralized network ('nerve net'), with one or two nets present. They do not have a head, but they have a mouth, surrounded by a crown of tentacles. The tentacles are covered with stinging cells (nematocysts).How do cnidarians protect themselves?
While some creatures such as sponges solve the dilemma of limited mobility by filtering the water for nutrients, cnidarians overcome the problem by deploying fast-acting neurotoxins through their stinging cells. These toxins can immobilize many prey and repel many predators upon contact.What are the characteristics of Coelenterates?
Characteristics. All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.What do cnidarians have in common?
Cnidarians are the earliest multicellular animals to have tissue-level organization. Common features of cnidarians include radially symmetrical diploblasts with true tissues and nematocysts. Cnidarians reproduce both sexually and asexually.What are the two basic body plans of cnidarians?
Cnidarians have two distinct body plans, the medusa (a) and the polyp (b). All cnidarians have two membrane layers, with a jelly-like mesoglea between them. Animals in this phylum display two distinct morphological body plans: polyp or “stalk” and medusa or “bell” (Figure 2).What is characteristic of all Ecdysozoans?
The most distinguishing and prominent feature of Ecdysozoans is their cuticle: a tough, but flexible exoskeleton that protects these animals from water loss, predators, and other aspects of the external environment. All members of this superphylum periodically molt or shed their cuticle as they grow.Which classes of cnidarians are polyps as adults?
Cnidarians have two distinct morphological body plans known as polyp, which are sessile as adults, and medusa, which are mobile; some species exhibit both body plans in their lifecycle.How do cnidarians get oxygen?
Cnidarians are aquatic animals that contain stinging cells called cnidocytes. While cnidarians do not have lungs or other respiratory organs, they do use body cells to take in oxygen and expel waste gases. This can be a problem in areas with stagnant water, as the lack of circulation decreases the available oxygen.Do cnidarians have a body cavity?
A coelom is a fully-encased, fluid-filled body cavity (gut) lined with mesodermic tissue. Cnidarians are not considered to have a coelom because they are diploblastic, so they don't have any mesodermic tissue. Cnidaria are a phylum consisting of aquatic animals like jellyfish, anemones, and corals. 
