origin of tetrapods.

Q: Describe the evolutionary changes that had to occur to go from a Osteichthyes to a mammal. What were…

A: Evolution is a phenomenon that occurs in the environment as a result of hereditary changes and…

Q: What are the characteristics/prominate features of a neanderthal skull?

A: The question is asking about the distinctive features or characteristics that are found in a…

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: Amphioxus does not possess a vertebral column? yes or no?

A: Amphioxus  They are also known as lanceolate and belonging to the group of invertebrate animals.

Q: Based on similarities among forelimbs, what bones did the common ancestor of tetrapods probably…

A: Introduction : Homologous organs are those organs that have a common origin but different functions.…

Q: What shared characteristic supports the surprisingly close relationshipbetween echinoderms and…

A: BASIC INFORMATION  EVOLUTION The theory of evolution was first given by the Jean Baptist de Lamark.…

Q: Tarsiers are strange creatures. They seem to share some traits with the more primitive prosimians,…

A: The skeleton of the head is called the skull or bony cranium. Skull is divided into parts-…

Q: Which of the following list places the important evolutionary innovations in the correct order of…

A: A phylogeny example is the evolutionary tree of organism demonstrating the history of animal organs.…

Q: Describe what happened to the dinosaurs.

A: Dinosaurs were the ancient organisms that live on the Earth 66 million years ago. It has been…

Q: What is the only difference between a fish and tetrapod

A: The change in the heritable characteristics of the species across many generations is called…

Q: Do all chordates have backbones?

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

Q: Name the two groups of nonvertebrate chordates.

A: Non- vertebrate consist of the following two groups:-

Q: In the rainforest you discover a new species that is terrestrial, has determinate development, molts…

A: Introduction  Morphology is the study of physical characters which can be visualized either by naked…

Q: Contrast the skeleton of an echinoderm with that of an arthropod.

A: The kingdom “Animalia” has several phyla (taxonomic rank: phylum). The organisms of this kingdom are…

Q: One of the following explain why it does nc osteon lamella

A: The bone tissue is of two types- Compact and spongy. There is presence of three types of cells in…

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: Is a cartilaginous skeleton a homolgy between early gnathostomes and cyclostomes due to their shared…

A: Gnathostomata is a class of jawed vertebrates and consists of around 60000 species of vertebrates.…

Q: Most adult echinoderms have an unusual symmetry pattern for a species within the Bilateria. Explain…

A: Echinoderms are of the phylum Echinodermata which includes marine animals such as starfish, sea…

Q: Explain how each molluscan feature is modified, compared to gastropod and bivalve body plans. 1)…

A: Cephalopods, Gastropods and Bivalvia are all classes of Molluscs. They differ in their habitats. For…

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: Evolution of the tetrapod limb was one of the most important events in vertebrate history. Describe…

A: The movement of tetrapods from the marine to the terrestrial environment signifies the evolution of…

Q: Skull parts are represented in only___ of the more than 100 genera of sauropods (A) 20 (B) 24 36 D…

A: Sauropods were a diverse group of long-necked, herbivorous dinosaurs that lived during the Mesozoic…

Q: What is unique about the specimen Ardi?    A. Her skeleton was the largest ever found and she…

A: The question is asking about the unique characteristics of the specimen Ardi, a fossilized skeletal…

Q: Does a pigeon have a skull with two post-orbital openings and a hip socket with a large perforation?…

A: , Birds evolved from theropod dinosaurs. These theropods share over 100 traits with modern birds.

Q: How and why did sponges develop skeletons, given that they were the first animals, there were no…

A: Sponges are the simplest form of multi-cellular organisms with structural complexities. They have…

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: Explain why are urochordates classified "not true Chordates"? (minimum of 500 words)

A: Various scientist agreed that, at least 42000 species of vertebrates exist today and there have been…

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: Define notochord

A: Embryogenesis refers to the development and formation of an embryo. It is characterized by the…

Q: Which of the derived characteristics came into existence before the bony shell?

A: Cladogram is a diagrammatic representation which correlates the evolutionary relationships among…

Q: What is the classification of the animal shown?

A: Animals are multicellular eukaryotic organisms that belong to the Kingdom Animalia. Every animal is…

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

A: Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as…

Q: What type of skeletal system do echinoderms have?

A: Echinoderms have the following characteristics- 1. They are radially symmetrical. 2. They are…

Q: “Fishapod” (or stem tetrapod) traits include everything except: Neck   Differentiated limb bones…

A: Tiktaalik roseae or Fishapod is considered to be the intermediate fossil between the fish and the…

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…

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.