Is the presence of myomeres a symplesiomorphic or synapomorphic feature of vertebrates compared to conditions in other deuterostome metazoans? And are these structures symplesiomorphic, synapomorphic, or neither for vertebrates considered alone?

Q: In planarians ampulation : What does the regeneration process like for heads/tails/trunks? Do they…

A: The stem cells can identify which part to replace or generate that they get molecular signs from…

Q: Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

A: Cnidarians, also known as coelenterates are mostly marine organisms and includes corals, hydras, and…

Q: Flatworms have no coelom. Recent gene sequencing shows that their closest relatives are the rotifers…

A: Coelom is the fully functional body cavity that is lined by mesoderm. Within the coelomic cavity,…

Q: Wouldn't the presence of myomeres in vertebrates be neither symplesiomorphic no synapomorphic when…

A: Synapomorphy is an evolutionary relationship in which a trait is shared by 2 or more taxa and their…

Q: Is the nervous system in platyhelminthes more or less sophisticated than in cnidarians? What are the…

A: Planarians includes flatworms that belong to the Class Turbellaria. These are free-living organisms…

Q: Scientific understanding of the evolution and phylogeny of the Arthropoda has changed enormously in…

A: Arthropods and annelids were thought to be closely linked for many years, with arthropods presumably…

Q: Some evidence suggests that members of Acoelomorpha constitute the sister group for all other…

A: Acoelomorphs are small, flatworms whose length is less than 5 mm. This group comprises around 350…

Q: What are four synapomorphies and four symplesiomorphies of gnathostomes?

A: Introduction When a character or trait  is shared by two or more taxonomic groups and is derived…

Q: Explain the major advantages and disadvantages of mollusk exoskeletons in comparison to worm…

A: Hi dear, here's your answer. The three skeleton types incorporate the hydrostatic skeleton, mollusk…

Q: Distinguish between (a) radial and bilateral symmetry; (b) blastula andgastrula; (c) direct and…

A: (a) radial and bilateral symmetry -  Bilateral symmetry is where the left and the right sides of the…

Q: Define what are Cnidarians ? Explain the role of Cnidarians ?

A: Cnidaria is a phylum under kingdom Animalia containing more than 11,000 types of amphibian creatures…

Q: The absence of muscle tissue in cnidarians primarily reflects...

A: The correct answer is option B: The presence of only two germ layers.

Q: Are humans plantigrade or digitigrade?

A: Human evolution explain the many mysterious fact about evolving humans from their ancestors apes

Q: several tetrapod lineages dont have legs.  a) name 3 lineages of legless tetrapods b) why do we…

A: Tetrapods relate to the vertebrates having four appendages or leg-like features. In scientific…

Q: What differences in morphology among Osteolepiformes (Eusthenopteron), Tiktaalik, and Ichthyostega.…

A: Osteolepiforme- Long and slender, with posterior fins set far back and a long mouth lined with…

Q: The chelicerates have 2 pairs of antennae (True/False)?

A: Arthropods dominate the protostome branch of the kingdom Animalia and are eucoelomate protostomes.…

Q: Crustaceans, like annelids, are segmented animals. But crustaceans unlike annelids have tagmata.…

A: Advantage:  The segmentation of annelids is highly adaptive, it allows more efficient movement.…

Q: Describe adaptations in the circulatory and neurosensory systems of cephalopods that are…

A: Mollusca is the largest marine phylum of the animal kingdom that is characterized by a mantle with a…

Q: what's the importance of morphology used as basis for classifying Cnidarians? does it have more…

A: Solution : Cnidarians are classified into four main groups: non-moving (sessile) Anthozoa (sea…

Q: How is the nervous tissue distributed in cnidarians?

A: Cnidarians are soft-bodied carnivorous animals. Cnidarians are classified into different groups such…

Q: Why was the medusa stage lost in some cnidarians? Do you think it is more advantageous

A: Solution : In the phylum Cnidaria, which includes jellyfish and sea anemones, polyp and medusa are…

Q: this is dugesia  Compare the body plan of Dugesia and cnidarians. Aside from differences in…

A: Cnidarian and Platyhelminthes (Dugesia) are invertebrate animals that do not contain notochord and…

Q: Worms are present in the Platyhelminthes, Annelid and Nematode lineages. How is the coelom used to…

A: Coelom is the principal body cavity that located between gut wall and the body wall. Type of coelom…

Q: What are various podomeres that make walking legs of the insects? Explain briefly

A: All the insects have their body segmented into the head, thorax and abdomen. The abdomen region…

Q: If lice originated prehistorically, how is a species of Pediculus found on present day monkeys?

A: Human evolution is considered to have begun with apes called Australopithecus, often known as…

Q: Which of the following is the correct classification for this chordate animal: This vertebrate…

A: Amphibians are cold blooded verte­brates having a smooth or rough, naked skin, rich in glands, which…

Q: Based on an evolutionary perspective, do you think the present forms of cnidarians are the best…

A: Cnidarians are diploblastic organisms , they have organized tissue level, and digestion is…

Q: How do the presence/loss, form, and function of the radula differ within members of the Classes…

A: Mollusks are a diverse group of animals that have a wide range of uses for humans. Many mollusks,…

Q: If nematodes are the most numerous animals, the Arthropoda, including insects, are the most diverse,…

A: Arthropods is the largest phylum of Animalia , they are also called ecdysozoans with paired…

Q: Are Protostome and Deuterostomes only applicable to tripoblastic animals?Are Cnidarians even…

A: Protostome along with deuterostomes and the Xenacoelomorpha are a group of animals called bilateria.…

Q: What is meant when it is said that beings of the phylum Annelida are vascular beings? From which…

A: Annelids are segmented worms. They live in a variety of habitat. They have a complete digestive…

Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.