If snakes are limbless, how can they be consideredtetrapods?

Q: What structures of chelicerates are analogous to the antennae of chilopods (centipedes) and other…

A: Introduction: Chelicerates fall under the category of arthropods and consists of scorpions, spiders,…

Q: which other invertebrate groups are likely to be the closest relatives of mollusks? provide…

A: INTRODUCTION Mollusca Second largest phylum of invertribrates after arthropodes.

Q: What features do all amphibians share?

A: BASIC INFORMATION  AMPHIBIANS  They are one of the class of Amphibia.  They are three different…

Q: How are insects distinguished from other hexapods?

A: Arthropods are the invertebrates that form one of the largest groups of phylum in the animal…

Q: What is one characteristics that separates chordates from all other animals

A: Most chordates are creatures with backbones/ spines. These reach from little fish to whales. They…

Q: Difference between class reptiles and class aves?

A: Vertebrates comprise all species of animals within the sub-phylum Vertebrata. It comprises of animal…

Q: How is the large size of some cephalopods related to the type of circulatory system they present?

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

Q: What characteristics is the ancestor of tetrapods thought to have had? Choose all that apply

A: Tetrapods  Tetrapods are the group of animals that have four legs. It the major group of animal and…

Q: What are four shared derived characters of chordates?

A: Chordates are the animals with a vertebral column called ‘back bone’. The chordate animals are free…

Q: What are four key defining characteristics of chordates?

A: Phylum Chordata is the third largest phylum. The animals belonging to this phylum are called…

Q: Do all chordates have backbones?

A: Chordates having following characters: Presence of dorsal hollow nerve cord. Presence of notochord.…

Q: Echinoderms have _____. a. triangular symmetry b. radial symmetry c. hexagonal symmetry d.…

A: A major group of marine animals are echinoderms. They are known for their spine like skin. These…

Q: How can brachiopods be distinguished from bivalves?

A: Invertebrates are organisms in which backbone is absent . It includes :-  A ) Arthropods  B )…

Q: How are the three main arthropod classes characterized according to the presence of wings?

A: Arthropods are the largest phylum in the animal kingdom and is an invertebrate animal characterized…

Q: What phyla of animals are most closely related to the chordates?

A: Chordates belong to the phylum Chordata. The Chordates in their full life cycle have one of the…

Q: How do chordates reproduce?

A: Chordates are the animals that have a notochord, a nerve cord, pharyngeal gill slits and post anal…

Q: What are four distinguishing characteristics of chordates?

A: The four qualities of chordates are a notochord, dorsal, pharyngeal cuts (or pockets), and postanal…

Q: What features of typical amphibians prevent them from living entirely on land?

A: Amphibians are the organisms which are vertebrates as they possess distinct backbone. They live…

Q: What are the features of a typical amphibian?

A: they are the vertebrates they live on both land and water they came into existence in the Devonian…

Q: What are three derived characters of echinoderms? Describe each.

A: The group of multicellular and heterotrophic organisms belonging to the kingdom Animalia is called…

Q: List the features that distinguish amphibians from fish.

A: The Chordata is the phylum of highly-evolved animals that includes vertebrates, urochordates…

Q: What advantages might amphibians gain from their “double life”?

A: Amphibians are vertebrates that can inhabit both terrestrial and aquatic environments. This term is…

Q: What are Bony Fishes ?

A: Fishes can also be classified into two types based on the type of skeletons ,they are Osteichthyes…

Q: Which chordates are craniates, and which of those are alsovertebrates?

A: Craniates are a group of chordates that possess a craniate skull made up of hard bone. All craniates…

Q: What external anatomical features of amphibians are associated with their dual life on land and in…

A: The word amphibian is a Greek word “amphi” and “bio”. “amphi” means dual or both kinds and “bio,”…

Q: Which amniotes are endothermic? What are some advantages of endothermy?

A: An organism alludes to something living that has a coordinated design, can respond to boosts,…

Q: What sarcoptergians or lungfish (if any) are related to amphibians?

A: Ans. In the superclass Tetrapoda ("four limbs"), the vertebrate community that has left the Sea for…

Q: What is a major difference in function of the coelom in holothurians compared with other…

A: The holothurians are commonly called sea cucumbers. They have one distinct feature which separates…

Q: What character does the term rhizarian indicate about the forams and actinopods?

A: Rhizaria are an ill-defined, species-rich supergroup consists mostly of unicellular eukaryotes.…

Q: Offer a description of an adult tunicate that would identify it as a chordate, yet distinguish it…

A: Chordates belong to the phylum Chordata.The Chordates in their full life cycle have one of the…

Q: Concerning the occurrence of separated sexes how are the beings of the phylum Annelida classified?

A: All the animal species on Earth are classified into different phyla or groups. The phylum Annelida…

Q: Why are echinoderms considered part of the Deuterostomes, despite having incredibly unique…

A: Echinoderms are marine, spiny invertebrates belonging to the phylum Echinodermata, superphylum…

Q: How do the skin and respiratory systems of amniotes differ from those of their early tetrapod…

A: Amniotes belongs to the kingdom Animalia and phylum Chordata. They belong to the clade of tetrapod…

Q: Cephalopods are the only mollusks (with segmented bodies/have a mantle that secretes a shell/with a…

A: Mollusca are designated as the second-largest phylum of the animal kingdom after Arthropoda. They…

Q: Do amphibians have directdevelopment?

A: Development process involves the growth of a multicellular organism and also increases the…

Q: Echinoderms are characterized by their spiny skin. What are these spines made of, and from what do…

A: Echinodermata are marine organisms with organ system level of organization. The adult echinoderms…

Q: Brachiopods superficially resemble bivalve molluscs, such as clams. How would you explain the…

A: brachiopods are marine invertebrates that comprises the lamp shells. They are places in phylum…

Q: Are snakes tetrapods? Explain.

A: Tetrapods includes land vertebrates with two pairs of pentadactyl limbs, cornified skin and lungs.…

Q: How does Anterior posterior axis gives chordate and higher non chordates a bilateral symmetry

A: Organisms having bilateral symmetry have a single plane of symmetry. The plane is called sagittal…

Q: Compare and contrast the symmetry and body shape of the different classes of echinoderms.

A: Phylum Echinodermata has five classes 1. Asteroidea (sea stars) 2. Ophiuroidea (brittle stars) 3.…

Q: What is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordates?

A: Echinoderms are the marine organisms that belong to the kingdom Animalia. They are triploblastic…

Q: Members of Chondrichthyes are thought to be descended from fishes that had ________. a. a…

A: Sharks, rays, and skate, as well as sawfishes and a few handful fish species known as chimaeras, or…

Q: What are the characteristic features of the chordates?

A: A phylum is a taxonomic classification that comes after domain and kingdom in the classification…

Q: What are similarities exist among Lycopods and horsetails? What are some of the differences

A: The kingdom Plantae includes land plants and green algae. Based on the presence or absence of a…

Q: What is Chordate body plan?

A: The vertebrates are the largest group of chordates, with over 62,000 species living. The vertebrates…

Q: In what ways were therapsids adaptively superior to the amphibians and reptiles that preceded them?

A: Therapsids are the ancestors of present-day mammals and their related ancestors. They represent an…

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.