They are characterized by a segmented body and jointed appendages. In the basic body plan, a pair of appendages is present per body segment. Within the phylum, classification is based on mouthparts, number of appendages, and modifications of appendages.
- 1 Do flatworms have limbs?
- 2 Do Platyhelminthes have jointed appendages?
- 3 Do roundworms have appendages?
- 4 What are 3 characteristics of flatworms?
- 5 What is the feeding appendage of a flatworm called?
- 6 Are flatworms Monoecious or dioecious?
- 7 Do flatworms have an exoskeleton?
- 8 Do Mollusca have appendages?
- 9 Do annelids have appendages?
- 10 Do Cnidaria have appendages?
- 11 Do Mollusca have jointed limbs?
- 12 How do flatworms and roundworms differ in body structure?
- 13 What are jointed appendages?
- 14 How are flatworms classified and what are their characteristics?
- 15 Are flatworms decomposers?
- 16 Do flatworms have cuticle?
- 17 Do flatworms have circular muscles?
- 18 Is a worm an amphibian?
- 19 Do nematodes have jointed appendages?
- 20 Are roundworms Monoecious or dioecious?
- 21 Do roundworms have Cephalization?
- 22 Which flatworms are dioecious?
- 23 What phylum is Monoecious?
- 24 Do flatworms have a coelom?
- 25 Do Chordata have appendages?
- 26 Do gastropods have appendages?
- 27 Which animal shows locomotion by setae?
- 28 Do earthworms have appendages?
- 29 Do sponges have appendages?
- 30 Do molluscs have exoskeleton?
- 31 Are setae appendages?
- 32 Do Ectoprocta have jointed appendages?
- 33 What are the characters of Arthropoda?
- 34 Is a beetle a crustacean?
- 35 Do all arthropods have jointed appendages?
- 36 What are examples of appendages?
- 37 Do clams have jointed appendages?
- 38 Do molluscs molt?
- 39 Do molluscs have limbs?
- 40 Are flatworms smooth and dry?
- 41 Are flatworms heterotrophic or autotrophic?
- 42 What are three major differences between roundworms and flatworms?
- 43 What phylum contains flatworms?
- 44 Why are Platyhelminthes flat?
- 45 Are flatworms prokaryotic or eukaryotic?
- 46 Is a worm a consumer or decomposer?
- 47 Is a beetle a decomposer?
- 48 Is a flatworm a secondary consumer?
- 49 Do roundworms have appendages?
- 50 Do Platyhelminthes have jointed appendages?
- 51 Where is the cuticle of the nail?
- 52 Do flatworms have an exoskeleton?
- 53 What is the feeding appendage of a flatworm called?
- 54 Do molluscs have circular muscles?
Do flatworms have limbs?
The word “worm” is not very scientific. But it is a word that informally describes animals (usually invertebrates) that have long bodies with no arms or legs.
Do Platyhelminthes have jointed appendages?
These jointed appendages are used by an organism for locomotion, sensing, feeding, etc. The animals with jointed appendages have a segmented body and a hard exoskeleton made of chitin. Complete answer: i) Flatworm: The flatworms belong to the phylum of Platyhelminthes.
Do roundworms have appendages?
Nematodes (roundworms) are colorless, unsegmented, and do not have appendages. Nematodes may be free-living, predaceous, or parasitic, and many of the parasitic species cause important diseases of plants, animals, and humans.
What are 3 characteristics of flatworms?
Attribute | Cnidarians and Ctenophores | Platyhelminthes (flatworms) |
---|---|---|
Bilateral symmetry | No | Yes |
Number of main cell layers | Two, with jelly-like layer between them | Three |
Distinct brain | No | Yes |
Specialized digestive system | No | Yes |
What is the feeding appendage of a flatworm called?
The phylum derives its name from the first pair of appendages: the chelicerae ([Figure 9]a), which are specialized mouthparts. The chelicerae are mostly used for feeding, but in spiders, they are typically modified to inject venom into their prey ([Figure 9]b).
Are flatworms Monoecious or dioecious?
Most flatworms can reproduce sexually or asexually. Most are monoecious. Most of these have developed ways of avoiding self-fertilization. Development may be direct (eggs hatch into tiny worms that resemble the adults) or indirect (with a ciliated larval form).
Do flatworms have an exoskeleton?
Exoskeleton and endoskeleton are absent in members of phylum Platyhelminthes. These are the first group of animals where three primary germ layers develop, i.e. ectoderm, mesoderm and endoderm.
Do Mollusca have appendages?
Arthropoda | Mollusca |
---|---|
Arthropods have wings to fly with jointed legs usually to their abdominal segments. | Molluscs have a muscular foot that helps in locomotion. |
Do annelids have appendages?
Appendages are absent in Annelids. Arthropods have jointed appendages.
Do Cnidaria have appendages?
Yes, some the members of the Cnidaria phylum have appendages.
Do Mollusca have jointed limbs?
Summary – Mollusks vs Arthropods
Phylum Molluska and Phylum Arthropoda are two major phyla of the Kingdom Animalia. Mollusks are soft-bodied animals with a shell while arthropods are animals with segmented bodies. They also have paired jointed appendages and an exoskeleton.
How do flatworms and roundworms differ in body structure?
A flatworm has a thin, dorsoventrally flattened body. Roundworms are more cylindrical in shape and tapered to a fine point at one end. Similarly, roundworms have a rigid outer covering called a cuticle that they shed repeatedly throughout their lives and as they grow.
What are jointed appendages?
A jointed appendage can be defined as the growth from the body of organism having joints in it. Jointed appendages is common charateristic of arthropoda. Jointed appendages in arthropodes may include legs, wings and mouth parts.
How are flatworms classified and what are their characteristics?
Flatworms are unsegmented worms with a tail and a head end. They are bilaterally symmetrical with a definite upper and lower surface. They have no body cavity or and no specialized respiratory or circulatory organs. This is the reason behind the flat shape, common to all flatworms.
Are flatworms decomposers?
Since most flatworms are parasitic in nature, they are mostly responsible for sickness or disease. However, some free-living flatworms do help the environment by acting as decomposers.
Do flatworms have cuticle?
Outer Covering
Flatworms: Flatworms lack a cuticle. The body of Platyhelminthes often contains cilia. Roundworms: Roundworms consist of a hard outer covering called cuticle.
Do flatworms have circular muscles?
The planarian has opposing muscles, circular muscles that extend around the flatworm and longitudinal muscles that extend from anterior to posterior of the flatworm. If the circular muscles contract, the flatworm changes shape to become long and thin.
Is a worm an amphibian?
Worms are neither insects nor amphibians; they are annelids. Technically, annelids are segmented worms, meaning they have segmented bodies.
Do nematodes have jointed appendages?
The nematodes, or roundworms, possess a pseudocoelom and consist of both free-living and parasitic forms. Finally, the arthropods, one of the most successful taxonomic groups on the planet, are coelomate organisms with a hard exoskeleton and jointed appendages.
Are roundworms Monoecious or dioecious?
The majority of nematodes are dioecious ; that is, the sexes are separate. Some species, however, are hermaphroditic, having both male and female reproductive organs.
Do roundworms have Cephalization?
Similarities: Both have three germ layers and bilateral symmetry. They both have anterior and posterior ends allowing cephalization to occur. Differences: 1. The roundworm has a body cavity called a coelom.
Which flatworms are dioecious?
There are monoecious hermaphrodite flatworms, such as planaria and taenias, as well as dioecious (having male and female specimens) species, such as schistosomes.
What phylum is Monoecious?
The members of the phylum Platyhelminthes are nearly all monoecious, though there may be a few examples out of the 18,000 species in the phylum that…
Do flatworms have a coelom?
Flatworms are hermaphroditic and capable of sexual and asexual reproduction. Their bodies have only a single opening, which serves as both a mouth and an anus. They are, as their name implies, flat. They have no circulatory system or body cavity (coelom), but they do have an excretory and digestive system.
Do Chordata have appendages?
All other chordates are craniates: they have a brain and a skull. There are two subphyla: the Agnatha, which lack jaws and paired appendages, and the Gnathostomata, which have jaws and usually have paired appendages as well.
Do gastropods have appendages?
Abstract. Basal gastropods have various types of body appendages. Besides pallial or cephalic tentacles, subocular tentacles, neck lobes and (occasionally) copulatory structures, there are epipodial tentacles and epipodial sense organs (ESOs), which have often been confused in the past.
Which animal shows locomotion by setae?
Setae of earthworm helps in locomotion.
Do earthworms have appendages?
The basic features of locomotion in annelids are most easily observed in the earthworm because it lacks appendages and parapodia. Movement involves extending the body, anchoring it to a surface with setae, and contracting body muscles.
Do sponges have appendages?
So, the correct answer is ‘Appendages‘.
Do molluscs have exoskeleton?
Molluscs are mostly aquatic, and are named from the Latin molluscus, meaning “soft”. Their soft bodies are enclosed in a hard shell made of calcium carbonate (CaCO3), which functions as an exoskeleton. This shell is secreted by a thin sheet of tissue called the mantle, which encloses the internal organs like a glove.
Are setae appendages?
All annelids except leeches also have chitonous hair-like structures, called setae, projecting from their cuticle. Sometimes the setae are located on paddle-like appendages called parapodia. Annelids are schizocoelous and with a large and well-developed true coelom (i.e., one that is lined with mesoderm).
Do Ectoprocta have jointed appendages?
Trilobites are extant. Ectoprocta are evolutionarily significant for being the first group of animals for having an anus separate from the mouth. Molluscs have jointed appendages and large muscular foots.
What are the characters of Arthropoda?
- They possess an exoskeleton.
- They have jointed appendages.
- Their body is segmented.
- They are bilaterally symmetrical.
- They possess an open circulatory system.
Is a beetle a crustacean?
This phylum includes insects like butterflies and beetles, crustaceans like crabs and lobsters, and chelicerates like spiders and scorpions. Arthropods are found in all parts of the world in a wide variety of environments, from the deep sea to the frozen arctic regions.
Do all arthropods have jointed appendages?
There are over 800,000 named species in the Phylum Arthropoda, named from the Greek arthros (= jointed) and poda (= foot), including the familiar arachnids, crustaceans, and insects, together with a host of less familiar critters, like centipedes, millipedes and sea spiders. All arthropods have jointed appendages.
What are examples of appendages?
The definition of an appendage, in relation to the body of a human or animal, is any part protruding from the torso or trunk. An example of an appendage is an arm or leg. An appendage is defined as an extra part that is attached to something. An example of an appendage is a leaf added to a dining table for extension.
Do clams have jointed appendages?
Spiders, crustaceans (crabs, lobsters, and shrimps), and insects have exoskeletons made up of sections with jointed legs. These animals are part of a group of invertebrates called arthropods, meaning “jointed legs.” Some mollusks, such as snails and clams, have a hard shell that they can hide in when danger threatens.
Do molluscs molt?
Growth and Molting
This is similar to the growth of annelids. Mollusks and arthropods both have tough chitinous exoskeletons.
Do molluscs have limbs?
Mollusks don’t have legs, though some have flexible tentacles for sensing their environment or grabbing things. Most mollusk species grow a hard shell for protection, but their shell grows in only one or two pieces.
Are flatworms smooth and dry?
Flatworms tend to be smooth and dry.
Are flatworms heterotrophic or autotrophic?
Flatworms are free-living heterotrophs or parasites.
What are three major differences between roundworms and flatworms?
Roundworms have a rigid outer covering called the cuticle. Often, flatworm has cilia on the surface of its body and not cuticle. Flatworms are acoelomates that they do not have a body cavity, whereas roundworms are psuedocoelomates. Flatworms have only one opening, which functions as both mouth and anus.
What phylum contains flatworms?
flatworm, also called platyhelminth, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates.
Why are Platyhelminthes flat?
They have a flat body because they do not have a coelom or even a pseudocoelom. They also lack a respiratory system. Instead, their cells exchange gases by diffusion directly with the environment. They have an incomplete digestive system.
Are flatworms prokaryotic or eukaryotic?
Kingdom: Animalia – Flatworms fall under the animal kingdom that is characterized by multicellular eukaryotic organisms.
Is a worm a consumer or decomposer?
Worms are part of a special group of species that eat dead or decaying organic matter. They are called decomposers. Decomposers are very important in our food chain, because they recycle the energy, and help us to start all over again!
Is a beetle a decomposer?
Dead wood-eating beetles are among the insect world’s best decomposers – organisms that digest dead matter and make their own living cells and tissues out of the acquired atoms.
Is a flatworm a secondary consumer?
This level includes both herbivores and carnivores: nematodes, protozoa, rotifers, soil flatworms, springtails, some types of mites, and feather-winged beetles.
Do roundworms have appendages?
Nematodes (roundworms) are colorless, unsegmented, and do not have appendages. Nematodes may be free-living, predaceous, or parasitic, and many of the parasitic species cause important diseases of plants, animals, and humans.
Do Platyhelminthes have jointed appendages?
These jointed appendages are used by an organism for locomotion, sensing, feeding, etc. The animals with jointed appendages have a segmented body and a hard exoskeleton made of chitin. Complete answer: i) Flatworm: The flatworms belong to the phylum of Platyhelminthes.
Where is the cuticle of the nail?
The cuticle is a layer of clear skin located along the bottom edge of your finger or toe. This area is known as the nail bed. The cuticle function is to protect new nails from bacteria when they grow out from the nail root.
Do flatworms have an exoskeleton?
Exoskeleton and endoskeleton are absent in members of phylum Platyhelminthes. These are the first group of animals where three primary germ layers develop, i.e. ectoderm, mesoderm and endoderm.
What is the feeding appendage of a flatworm called?
The phylum derives its name from the first pair of appendages: the chelicerae ([Figure 9]a), which are specialized mouthparts. The chelicerae are mostly used for feeding, but in spiders, they are typically modified to inject venom into their prey ([Figure 9]b).
Do molluscs have circular muscles?
These walls mainly consist of circular muscle fibres that squeeze water out of the mantle cavity when they contract. … Though many mollusks have shells, most molluscan muscle systems depend on the principle of the hydrostatic skeleton.