The coelom a. is a synapomorphy for the clade comprising protostomes and deuterostomes. b. evolved multiple times convergently. c. is always an indicator of close evolutionary relationship. d. forms within the endoderm.

Q: To what order do primitive mammals that lay eggs belong? A. Marsupials B. Craniata

A: The process through which an organism produces more of its own offspring is known as reproduction.…

Q: The two phyla in the Deuterostomia are a. Arthropoda and Nematoda. b. Brachiopoda and…

A: The Deuterostoma is one of the major groups, a superphylum in the animal kingdom. They belong to…

Q: This limb is found in a member of kingdom animalia. The class/group that this limb matches to is: a)…

A: Limbs are appendages used for locomotion. Porifera stay attached to a substrate and don't move.…

Q: (a) State two advantages of cephalisation (b) Outline the advancement features of reptiles that…

A: Cephalization is the differentiation of the anterior end of an organism into a definite head. This…

Q: The first coelomate animals are the (Nematoda/Platyhelminthes/Mollusca/Arthropoda)?

A: coelomates or eucoelomates are the organisms that possess true coelom. The true coelom is considered…

Q: A swim bladder is a gas-filled sac that helps fish maintainbuoyancy. The evolution of the swim…

A: Introduction Fishes lives in aquatic environment where there is low availability of Oxygen in water.…

Q: Cnidocytes (a) are characteristic of sponges (b) are found among cells lining the gastrovascular…

A: The group of eukaryotic and multicellular organisms that are heterotrophic and belong to the kingdom…

Q: Create lists of animal phyla that (a) are cephalized, (b) have an incomplete digestive tract, (c)…

A: The phylum is the third grade in the pecking order. Which has the details of the organism properties…

Q: With an help of properly illustrated drawings, explain the difference in the development of…

A:

Q: A body cavity fully lined with tissue derived from mesoderm is called a______ . a. coelom c.…

A: Mesoderm can be defined as the germ layer that is present in animal embryos  will give rise to the…

Q: Phylum Chordata: (Made up of 3 subphyla, two of which lack a true backbone) 1. State the four…

A: Chordata is a vast class of animals that contains vertebrates as well as sea squirts and lancelets.…

Q: Explain how the molluscan foot in gastropods and the excurrent siphon in -cephalopods represent…

A: Molluscs:          An invertebrate of the large phylum, that posses soft unsegmented body and often…

Q: Distinguish between (a) radial and bilateral symmetry; (b) blastula andgastrula; (c) direct and…

A: (a) radial and bilateral symmetry -  Bilateral symmetry is where the left and the right sides of the…

Q: You find a coelomate animal during a field trip and discover that the embryos undergo spiral…

A: Hi, Thanks For Your Question.  Answer : Correct Option Is D

Q: Discuss the idea that every evolutionary adaptation has both advantages and disadvantages, using…

A: Cephalization is the development of ahead, where the sensory organs and the brain are organized.…

Q: You read a research article presentsing new phylogenetic data demonstrating that species that…

A: Answer- Correct option is (A) Evolution of the pseudocoelom occurred more than once.

Q: The idea that the development of an animal embryo follows the evolutionary history of its species is…

A: The biogenetic law is a hypothesis of improvement & evolution which was given by Ernst Haeckel…

Q: Segmentation, first seen in annelids, allows evolutionary advantages bya. allowing more fluid…

A: The segmented body is the most noticeable of the annelid phylum's identifying characteristics. The…

Q: Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates.…

A: The Echinoderms belong to the phylum Echinodermata. They possess radial symmetry and inhabit the…

Q: Lobe-finned fishes are important because theya. were the first vertebrates.b. were the earliest…

A: Lobe-finned fishes are coelacanths and lungfish have paired fins that comprise an extended fleshy…

Q: During a survey you spot a soft bodied animal enclosed in a two-piece shell. How can you determine…

A: Humans rely heavily on the marine environment and its inhabitants. We rely on the environment that…

Q: defining trait found in chordate embryos

A: Answer: Defining characteristics of chordates: In chordates, four common features appear at some…

Q: Which clade does not include frogs?a. vertebrates b. gnathostomesc. tetrapods d. amniotes e. lobe…

A: A clade is a group of organisms that have a common ancestor. Frogs belong to the amphibians and are…

Q: Suppose you watch a video showing the development of an unknown animal. What clues can the…

A: Animals can be classified based on morphological characteristics (traits that can be observed after…

Q: Unlike eutherians, both monotremes and marsupials(A) lack nipples.(B) have some embryonic…

A: Mammals are warm blooded, have hairs and mammary glands. They are homoiothermous. In the skin oil…

Q: You find a flatworm during a field trip and discover that the embryos undergo spiral cleavage. What…

A: The daughter cells are positioned in the grooves of the parent cells in a spiral division. The…

Q: Unlike Archaeopteryx, modern birds have_______ . a. a long bony tail c. a two-chambered heart b. a…

A: The oldest known fossil bird is Archaeopteryx, which dates from the late Jurassic period. It…

Q: Embryo above pictured here is a/an O A. blastula O B. gastrula O C. planula O D. zygote

A: Human embryonic development refers to the development of embryo. It involves the process of cell…

Q: Which of the following is not possible? a. radially symmetrical diploblast b. diploblastic…

A: All of the organisms that live in the ecosystem have different properties with respect to the other.…

Q: An animal whose blastopore develops into a mouth and the second opening into the anus can be called…

A: Need to find the name of second opening in anus for the animals whose blastopore develops into a…

Q: Vertebrates and tunicates share(A) jaws adapted for feeding.(B) a high degree of cephalization.(C)…

A: Chordata is the largest phylum of subdivision- Deuterostomia. It was created by Balfour in 1880.…

Q: Characterize both aves and teleosts as highly derived from other vertebrates by giving examples of…

A: The class Aves is characterised by having feathers, toothless beaked jaws.They lay hard-shelled…

Q: The oldest body fossils of a land animal are of_____ .a. insects c. cnidariansb. roundworms d.…

A:

Q: A member of the protostome group of animals   a. has no symmetry.   b. has an anus derived from…

A: Protostome: are the group of animals, which include the arthropods, and other mollusks and worms and…

Q: Archaeopteryx is a significant fossil find because it gave hints to the evolution of the following…

A: Fossils refer to remains or traces of past life preserved through natural processes. Imprints,…

Q: The genus Sinitrofulgur includes whelk species that prey on Mercenaria bivalves. Which statement…

A: The correct answer to this problem would be:- D• The Sinitrifulgur specimens featured cracks in…

Q: Tetrapods evolved from_______ . a. sharks c. lobe-finned fishes b. teleosts d. placoderms

A: All extant and extinct creatures that evolved from the last single ancestor of amphibians, mammals,…

Q: Which of the following statements is NOT true regarding protostome diversity?   A. Of the 30…

A: Blastopore is the opening of the archenteron on the surface of an embryo in the gastrula stage of…

Q: You find a worm and discover that it has no coelom, no nephridia and a mouth but no anus. What must…

A: Xenacoelomorphs are invertebrate organisms that also lack true body cavities and are thus…

Q: Cephalopods have complex eyes that arose separately from vertebrate eyes that are also used in…

A: Answer:-  Cephalopods vision system is very complex systems like in vertebrate .  And the eye…

Q: Living vertebrates can be divided into two majorclades. Select the appropriate pair.(A) the…

A: Chordates are characterised by the presence of notochord. They can be classified into vertebrates…

Q: According to Matthew Baron, the only group of dinosaurs that was composed entirely of…

A: Triassic Period was the first period of the Mesozoic Era and during which the first dinosaurs…

Q: An animal whose development is marked by radial cleavage and enterocoely is ________. a. a…

A: Kingdom Animalia contains all animals. It is the largest kingdom of Animalia as compared to other…

Q: The jelly like substance found between ectoderm and endoderm in Cnidarians is called the ___

A: Cnidarians are marine animals that belong to phylum Cnidaria and they have radial or biradial…

Q: A bird or feathered dinosaur is ________. a. Neornithes b. Archaeopteryx c. Enantiornithes d.…

A: Dinosaurs that have feathers on their body are known as feathered dinosaurs. This species of…

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.