What happened to the digits as tetrapod legs evolved

Q: name and describe the craniates that are not vertebrates?

A: Vertebrates are known as craniates because of the presence of a skull or cranium. Craniata includes…

Q: What type of symmetry do the Echinoderms have? Do they have this type of symmetry their entire…

A: Echinoderms or spiny skinned animals belong to the phylum Echinodermata. They are marineand…

Q: How does the foot of a bivalve differ from that of snails or chitons?

A: Limpets or Notoacmea, Collisella are known as small, cone-shaped shells found on the rocks…

Q: Which Animals Are Chordates?

A: Animals are multicellular eukaryotic organisms belonging to kingdom Animalia that are heterotrophic,…

Q: What group of animals has jaws but not a bony skeleton?

A: Organisms comprise a complete set of bones with Bony skeletons that give shape and structure to…

Q: What evidence is there that dinosaurs brooded their eggs and tended their young long after they…

A: Dinosaurs are an assorted gathering of reptiles of the clade Dinosaurian. They initially showed up…

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: How are a fish’s and a bird’s skeletons similar in structure andfunction?

A: Introduction: Fish belong to phylum Chordata and is a marine living creature. However, birds also…

Q: Do all chordates have backbones?

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

Q: Give an example animal for some of the key adaptations of chordates: (a) backbone, (b) skull, (c)…

A: The Chordata can be described as the animal group involving highly evolved animals with anatomical…

Q: What evidence suggests that radial symmetry in echinoderms was secondarily derived?

A: Radial symmetry means that you cut an organism along any diagonal you will get two equal halves of…

Q: Give an account of the bones of the fore-or hindlimb of frog and explain how they are related to the…

A: The skeleton is the framework of the animal body and on the basis of it, two different divisions of…

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: How are prosimians different from the group consisting of American monkeys, African-Eurasian…

A: The discussion on this subject examines the differences between prosimians, a suborder of primates,…

Q: How does the limb orientation of "advanced" tetrapods differ from that of "primitive" tetrapods? How…

A: Tetrapods are four-footed animals that belong to a group that comprises all vertebrates above the…

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: How does the alligator snout become elongated relative to the salamander’s?  Does it add new bones,…

A: Alligators are semi-aquatic carnivores, also sometimes referred as "living fossils" showing…

Q: The following image is from a scientific publication by paleontologist Niel Shubin, who was part of…

A: Homologous structures such as organs or bones are the structures which posses similar anatomical…

Q: Which group of hadrosaurs had crests?

A: Hardradosaurids means bulky lizards. They were the family of herbivores dinasaurs. They were the…

Q: How did the vertebrate appendage evolve into the limbs we find so useful today?

A: The tetrapods consist of the a pair of forelimb and a pair of Hindlimb and these are supported by…

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: Can fossils bridge the evolutionary gap between fish and tetrapod vertebrates?

A: Phylogeny is the branch of biology that studies phylogenetic analysis. A phylogenetic analysis is…

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 amphibians undergo metamorphosis

A: Metamorphosis in amphibians is the transformation of the larva to a miniature adult replicate, and…

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: Do amphibians have directdevelopment?

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

Q: How did HOMO successfully expand around and out of AFRICA?

A: ANSWER;- - These environment shifts, set off by the wobble of Earth's pivot, made green hallways…

Q: What dinosaurs did Acrocanthosaurus lived with in its time in North America like what herbivores or…

A: The Acrocanthosaurus was a flesh eating theropod that lived all through the Early Cretaceous period…

Q: You do not have a notochord, a tail, or pharyngealslits. How do we know that you are a chordate?

A: Phylum Chordata is the most common phylum present in the animal kingdom. These animals have…

Q: How do we know that echinoderms were derived from an ancestor with bilateral symmetry?

A: Echinoderms got this name from Greek word echinos means spiny and dermos  means skin. Phylum…

Q: Agnathans (Jawless FIsh) Look at the image that is attached to this question to answer the…

A: The Agnatha comprises of the jawless fishes, the most primitive group of surviving vertebrates.…

Q: What are the Importance of the origins of amniotes?

A: All fully terrestrial vertebrates are classified as amniotes, which also includes all living reptile…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.