You find a worm and discover that it has no coelom, no nephridia and a mouth but no anus. What must be true of this animal? A. it is a xenacoelomorph B. it is s pseudocoelomate C. it is hermaphroditic D. it exhibits bilateral symmetry E. A, C and D

Q: A barnacle is a shelled______ . a. arthropod c. cephalopod b. gastropod d. crustacean

A: The group of eukaryotic, multicellular, and heterotrophic organisms is classified under the kingdom…

Q: Unlike other coelomate animal phyla, mollusks lacka. segmentation.b. cephalization.c. three primary…

A: Coelomate animals are those that contain a body cavity enclosing coelom with a complete lining…

Q: Which of the following is most closely related to lobsters and what characteristics are significant…

A: Lobsters are a group of crustaceans which are commercially important because they are consumed as…

Q: In the deuterostomes the digestive tract (Gut) forms from the cells of the a) ectoderm b) nerve…

A: Deuterostome are type of division of animals in which blastula of developing embryo becomes anus…

Q: 13 - Chambered heart occurs in:   A) Leech B) Earthworm C) Snail D) Cockroach

A: The heart performs the function of pumping blood to the different parts of the body. Different…

Q: Flatworms can reach a maximum size of around 40cm. Whilst this is big for a worm, there are…

A: Introduction Flatworms or Platyhelminthes are acoelomate, bilaterally symmetrical, soft bodies…

Q: Stalked jellyfishes" belong to which class?    A. Staurozoa B. Scyphozoa C. Anthozoa D.Hydrozoa E.…

A: Stalked Jellyfishes are the sole living members of Class Staurozoa.

Q: Crustaceans are _____. a. ecdysozoans b. nematodes c. arachnids d. parazoans

A: Answer is a.)  ecdysozoans.

Q: Describe the following general characteristics can be used to distinguish among Animal phyla: a.…

A:

Q: Which group of flatworms are primarily ectoparasites of fish? a. monogeneans b. trematodes c.…

A: The flatworms come under Phylum Platyhelminthes and comprise a very diverse group of worms.  The…

Q: Reptiles (a) are all endotherms (b) are amniotes (c) have a great deal of keratin in their epidermis…

A: Vertebrate includes all species of animals within the vertebrata subphylum. These represent the…

Q: The larval stage of a cnidarian is known as a a. medusa. b. planula. c. polyp. d. cnidocyte.

A: Non-chordates are the life forms that do not have any backbone or notochord in their structure.…

Q: Nematodes once were thought to be closely related torotifers due to the presence of a pseudocoelom…

A: Nematodes:         Nematodes can be otherwise known as roundworms, which comes under the hood of…

Q: What characteristic is common to the flatworms, molluscs, and annelids? a. All have bilateral…

A: Organisms with a single plane of symmetry are called bilaterally symmetrical. Organisms which lack a…

Q: A coelomate organism may have which of the following characteristics? a. Circulatory system b.…

A: A coelomate organism may have which of the following characteristics?

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: Flatworms, annelids, and roundworms are all______ . a. arthropods c. protostomes b. aceolomate d.…

A: Vertebrates are organisms which possess backbone. They also possess notochord. Examples includes:…

Q: completely wraps the cavity is called: a) coelom b) pseudocoelom c) acoelom d) Archenteron e)…

A: 5th answer is b

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: 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: A ciliated feeding structure in the larval stage is a characteristic of aa. trochozoan.b.…

A: The systematic classification of animals is necessary for the purposes of identification and…

Q: Animals like annelids and arthropodsetc where the body can be divided intoidentical left and right…

A: Animals are multicellular eukaryotic organisms. It forms the biological kingdom Animalia.…

Q: Arthropods are the first phyla to possess: A)a brain B)an exoskeleton C)a complete digestive…

A: The organisms belonging to the phylum Arthropoda are characterized by the presence of pairs of…

Q: The function of the contractile vacuole in many freshwater protozoans is to: a) aid in mechanical…

A: Sponge cells and freshwater protozoans have contractile vacuoles as organelles. The bubble-like…

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: Annelids and_______ have a closed circulatory system. a. insects c. flatworms b. cephalopods d. sea…

A: Introduction :- The heart pumps blood into the vessels so that it can reach the tissues and organs…

Q: a) What is the unique characteristic of the prawn? b) State the organ that helps prawn swim. c) What…

A: Prawns belong to phylum arthropoda. Arthropoda is the largest phylum of animal kingdom. The unique…

Q: Which is not true about Cnidarians? A1. Some cnidarians go through polyp stages and medusa stages A.…

A: Cnidarians are invertebrates such as jellyfish and corals, belongs to the phylum Cnidaria. All…

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: a rabbit is a tetrapod. It has hair, a large brain, and acute vision and sense of smell. It nurses…

A: Any animal belonging to the subphylum Vertebrata, which is the most usual subphylum of the phylum…

Q: The pericardial cavity forms froma. evagination of the early digestive tract.b. the neural tube.c.…

A: The pericardial cavity has a small amount of serous fluid that helps to reduce lubrication and…

Q: Match the organism to their body symmetry * sponges A. asymmetrical + earthworm B. bilateral *…

A: Body symmetry means that in how many equal parts an organism can be divided. If an organism is…

Q: Annelids have (a): a. pseudocoelom. b. true coelom. c. no coelom. d. none of the above

A: Answer is b.)  true coelom.

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: One of the characteristics unique to animals is(A) gastrulation.(B) multicellularity.(C) sexual…

A: Organisms are open systems that maintain homeostasis, are composed of cells, have a life cycle,…

Q: The egg of a fish is what type of chordate egg and why? a. isolecithal b. telolecithal with total…

A: All fish eggs are surrounded by using an envelope, referred to as the zona pellucida (ZP), that…

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: 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: Among living animals, only birds have_____ . a. a cloaca c. feathers b. amniote eggs d. a…

A: Introduction :- The tissue that will become the female fetus's intestinal, genital, and urinary…

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…

Defense Mechanism

Circumstances influence and compel people to behave in a certain way. One such behavior is a defense mechanism. It is employed by people to escape from unpleasant circumstances, thoughts and actions. Defense mechanisms are, thus, psychological strategies that help to avert and avoid unwanted feelings such as guilt or shame and situations such as threat and danger.