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: 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: 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: 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: How is the nervous tissue distributed in cnidarians?

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

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: 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,…

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.