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: Explore the evolutionary relationship between birds and theropod dinosaurs and discuss the bird…

A: Based on similar features, scientists reasoned that maybe the theropods were the ancestors of birds.…

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: Describe three key amniote adaptations for life on land.

A: The amniotic egg provides protection to the embryo and allow it to develop on land, eliminating a…

Q: Explain what the structural change was, as well as its significance, for the improved circulation…

A: Regardless of variances, most reptile lungs function in a similar manner.  Reptile lungs, like…

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: Imagine if centaurs were real. Make a Cladogram (Evolutionary Origin) showing its closest relatives…

A: The cladogram is a family tree that shows the evolutionary relationship between different species.…

Q: Compare a Male Baboon to a Male Human. Compare the Articulated Foot, the Coccyx/Sacrum/Os Coxae, and…

A: The objective of this question is to compare the anatomical structures of a male baboon and a male…

Q: Explain the term thecodont and diphyodont.

A: The term dentition refers to the development of teeth and their arrangements in the mouth. In…

Q: make a labeled drawing of the lateral view of the skull of a crocodile

A: The skull of the crocodile is diapsid just like all other reptiles. It has two openings on each side…

Q: Why is there a shorter lactation period in eutherians compared to marsupials?

A: Marsupials are the animals that are born immaturely and are carried by their mothers in their…

Q: Which of the following is not a synapomorphy of craniates?

A: Craniates are a group of chordates that includes many organisms that have a cranium or a braincase.…

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: Birds are often referred to as “living dinosaurs.” Is this accurate? Why or why not?

A: A phylogenetic or evolutionary tree is defined as a branching diagram showing or depicting the…

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: Sahelanthropus tchadensis Facial bones

A: Man is the result of evolution. As a result, human evolution is intrinsically related to the origin…

Q: Chordates are named for having this generalized structure. A. Spinal cord B. Stomochord C. Notochord…

A: The chordates is an advanced group in the animal kingdom. The chordates include cyclostome,…

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: You decide that it is a eutherian rather than a marsupial. How do you know based on its…

A: A marsupial is a mammal that raises its newborn offspring inside an external pouch at the front or…

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: Identify the geologic era and periods in which chordatesand the first vertebrates appear.

A: The chordates are first found in cambrian period which is 530 million years ago

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: 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: Which of the following is true as the presence of bones is similarly found both in the baleen whale…

A: Baleen whales (systematic name Mysticeti), also known as whalebone whales, form a parvorder of the…

Q: Why are external skeletons important for soft-bodied invertebrates?

A: Skeleton is the robust structure exhibited in the organism which act as scaffold for the body.…

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: According to "Our Earliest Ancestors", what is unique about the specimen Ardi?    A.She had a long,…

A: The question is asking about the unique characteristics of the specimen Ardi, according to the text…

Q: What is the closest common ancestor of the Allosaurus and Aves? A. Maniraptora B. Theropoda C.…

A: The cladogram presented here consists of four major clades which are Dinosauria, Saurischia,…

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: Characterized by a pelvis with the pelvic bones radiating from the center Ichthyosaurs Plesiosaurs…

A: Dinosaurs These are a diverse group of reptiles belonging to the clade Dinosauria. They first…

Q: Which structure classifies an organism as a gnathostome? a lateral line system a mineralized bony…

A: structures which classify gnathostome are Jawed fishes comprising of mostly of 90% living…

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: Describe three important differences between the skeletons of the crayfish and the pig.

A: SOME BASIC INFORMATION  SKELETON  It is a structure which is formed by bones  It basically forms the…

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: Distinguish ornithischian and saurischian dinosaurs based on their hip anatomy.

A: Dinosaur is any of group of extinct, frequently very large carnivorous or herbivorous archosaurian…

Q: Which is NOT a characteristic of all chordates Group of answer choices phalangeal slits post-anal…

A: A chordate is a member of the Chordata phylum. At some point during their larval or maturity stages,…

Q: In a table, compare and contrast the generalized fish and generalized tetrapod skulls based on the…

A: The skull consists of Chondrocranium which is derived from neural crest cells and mesodermal…

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: Diapsids possess a single temporal ópening in their Skulils true false Other:

A: Diapsids are a group of amniote tetrapods. Modern diapsids include lizards, snakes, turtles, birds,…

Q: What is the classification of the animal shown?

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

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.