Table of Contents
- 1 Are arthropods related to cnidarians?
- 2 What is the main difference between the Cnidaria and the platyhelminthes phylum?
- 3 What is the difference between crustaceans and arachnids?
- 4 What is the primary difference between Cnidaria and ctenophores?
- 5 How are cnidarians and platyhelminthes similar?
- 6 What are the similarities and differences between Annelida and Arthropoda?
- 7 What is the phylum of Arthropoda?
Since about 75\% of all animal species are arthropods, they represent the largest invertebrate group. Cnidarians are also simple aquatic animals like sponges, but their possession of a nerve system makes them more complex than sponges. Jellyfish, hydras, sea anemones, and corals make up the four classes of cnidarians.
How can you tell the difference between arthropods?
The distinguishing feature of arthropods is the presence of a jointed skeletal covering composed of chitin (a complex sugar) bound to protein. This nonliving exoskeleton is secreted by the underlying epidermis (which corresponds to the skin of other animals).
What is the main difference between the Cnidaria and the platyhelminthes phylum?
Cnidarians are diploblastic, whereas Platyhelminthes are triploblastic. Platyhelminthes possess bilaterally symmetrical, soft, worm-like elongated bodies, whereas cnidarian possess radially symmetrical, soft, medusa-like or polyp-like body forms. Cephalization is present in Platyhelminthes, but not in cnidarians.
How are Cnidaria and echinoderm alike?
The main similarity between echinoderms and cnidarians is that they are aquatic animals. The vast majority of both groups live in the ocean, though…
What is the difference between crustaceans and arachnids?
Unlike crustaceans, arachnids have no antennae and mandibles. Most arachnids are terrestrial, and few are secondarily aquatic, whereas crustaceans are exclusively aquatic. Examples for arachnids include scorpions, spiders, mites, and ticks. Examples of crustaceans are prawns, lobsters, shrimps, barnacles, and crabs.
What is the difference between Arthropoda and Mollusca?
Arthropods are organisms having exoskeleton and segmented bodies with paired appendages….Differentiate between Arthropoda and Mollusca.
Arthropoda | Mollusca |
---|---|
Arthropods have wings to fly with jointed legs usually to their abdominal segments. | Molluscs have a muscular foot that helps in locomotion. |
What is the primary difference between Cnidaria and ctenophores?
Both cnidarians and ctenophores are diploblastic animals. Cnidarians exhibit radial symmetry whereas ctenophores exhibit biradial symmetry. Both contain tentacles, surrounding their mouth. The main difference between cnidarians and ctenophores is their body symmetry.
What is the difference between nematodes and platyhelminthes?
The phylum Platyhelminthes contains flatworms, whereas nematodes are roundworms. Platyhelminthes are acoelomate, whereas nematodes have pseudocoelom. Platyhelminthes are hermaphrodites or monoecious, whereas nematodes are dioecious, i.e. sexes are separate.
How are cnidarians and platyhelminthes similar?
Like the cnidarians, flatworms have a digestive system with only a single opening into the digestive cavity, but in independently living marine flatworms the cavity branches into all parts of the body (Fig. 3.37 B).
What are the two body forms of cnidarians?
Cnidarians have radial symmetry, tentacles, and two layers of tissue surrounding a central “stomach” cavity. They also have one digestive opening and a nerve network. The two body forms of cnidarians are called polyp and medusa.
What are the similarities and differences between Annelida and Arthropoda?
Both Annelida and Arthropoda are composed of segmented animals. The main difference between Annelid and Arthropoda is that Annelida consists of a hydrostatic skeleton whereas Arthropoda consists of an exoskeleton made up of chitin.
What is the difference between cnidarians and Platyhelminthes?
The main difference between Cnidarian and Platyhelminthes is that Cnidarians are diploblastic, whereas Platyhelminthes are triploblastic, but there are other differences too between these too invertebrates.
What is the phylum of Arthropoda?
Arthropoda: Arthropoda refers to an animal phylum that consists of haemocoelomates with a segmented body, joint appendages, and chitinous exoskeleton. Annelida: Annelids are commonly called segmented worms.