A. Haemologbin B. Ecdysine C. Anticoagulant D. fibrinogen 19. One who specializes in all kinds of fishes and their characteristics, developing expertise in A. taxonomy B. histology C. entomology D. Ichthyology 20. In protozoan, digestion occurs in the A. Stomach B. Contractile vacuole C. Ribosome

Q: The rhynchocoel is a ________. a. circulatory system b. fluid-filled cavity c. primitive excretory…

A: Step 1 The phylum Nemertea, also termed as ribbon worms are unique due to the presence of a…

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: Which of the following is not a correct pair? (a) protonephridia; flatworm (b) metanephridia;…

A: Excretory system involves the removal of the digested materials that are eliminated from the body.…

Q: Cells of a sponge that have cilia and direct water flow through the sponge are called_____.…

A: Sponges are the members of Phylum Porifera. They are multicellular organisms with pores and channels…

Q: A land snail, a clam, and an octopus all share(A) a mantle.(B) a radula.(C) gills.(D) distinct…

A: The land snail refers to numerous snail species which lives on land. A clam refers to a bivalve…

Q: If the septa of an anthozoan are removed, which of the following would result? B. the inability to…

A: Anthozoa is a class of marine invertebrates which includes the sea anemones, stony corals and soft…

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

A: Answer is a.)  ecdysozoans.

Q: Archaeocytes are associated witha. digestion in bacteria.b. the digestive tracts of sponges.c. the…

A: Archaeocytes are otherwise called amebocytes. They are specialized cells present in the sponges. The…

Q: Which of the following has a complete digestive system? a. tapeworms c. cnidarians b. sponges d.…

A: Digestive system is one of the systems in the body which carries out digestion. Digestion is the…

Q: The sister taxon of the Chordata is the _____. a. Mollusca b. Arthropoda c. Ambulacraria d. Rotifera

A: All living organisms are classified based on their internal and external features. The science of…

Q: In the flatworm, flame cells are involved in what metabolic process? a. Reproduction b.…

A: Answer is d.) Osmoregulation.

Q: a ECHINODERMATA B b E MOLLUSCA F NEMATODA A CNIDARIA d

A: Metazoa or animals are multicellular eukaryotic organisms that are included in the Animal kingdom.…

Q: Animals at risk which offer potential medical uses include all of the following EXCEPT (a)…

A: Animals, plants including microorganisms are proven to  be very beneficial with reference to the…

Q: Bivalves, cephalopods, and gastropods are alla. arthropods.b. lophophorans.c. cnidarians.d.…

A: Animal Kingdom is a diverse group, including organisms ranging from non-motile simple sponges to…

Q: To acquire nutrients, spongesa. filter microorganisms from water brought in throughpores.b. use…

A: Sponges: Sponges are primitive multicellular animals. All are aquatic, generally marine but few are…

Q: From the name "fish tapeworm," one can conclude that the: a) larval stage of the tapeworm occurs in…

A: An intestinal infection caused by a parasite found in fish is known as fish tapeworm disease.  The…

Q: Gills are found in a. fish. b. amphibians. c. aquatic invertebrates. d. All of the choices…

A: Gills are respiratory structures with a high surface area that allow the aquatic organisms to…

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: Which pair shows endoparasites? a.)tick and mosquito b.)tapeworm and leech c.)leech and flea…

A: Parasites are the living organisms which are found in association with the host organism. Such an…

Q: Poison glands of snakes are homologous to: A. electric organs of fishes B. stings of rays…

A: Among the given options, option (d)is the most appropriate. Poison glands are generally associated…

Q: Which of the following statements regarding tapeworms is false?a) They absorb nutrients from the…

A: Platyhelminthes are a phylum of organisms, that are triploblastic, acoelomate and have bilateral…

Q: The muscles of an entropneust (acorn worm) pericardium are responsible for, which of the following…

A: Acorn worm, also known as an enteropneust, which belongs to the class Enteropneusta, phylum…

Q: In arthropods, the tracheal system isa. a unique set of structures that function in ingestion and…

A: Arthropoda belongs to the Kingdom Animalia and is known for having segmented bodies with appendages.…

Q: One genus in Phylum Platyhelminthes is Turbellaria, which consists of free-living worms with a thin,…

A: They are bilaterally symmetrical, triploblastic, and acoelomate. They could be parasitic or…

Q: Cnideria

A: Answer is option E. Aside from sponges, all animal phyla have a digestive tract, or gut. Cnidaria…

Q: Which of the following worms deposit their eggs in the perianal folds? a)tapeworms b)liver fluke…

A: These are all human parasitic nematodes or trematodes.

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: Earthworms are most closely related to________ . a. tapeworms c. planarians b. roundworms d. leeches

A:

Q: The sea slugs (nudibranches) may protect themselves by using which of the following methods?…

A: The predators are organisms that eat another organism. Prey is an organism that predators eat. For…

Q: Which of the following is NOT a characteristic of annelids?   A.they have a closed circulatory…

A: THE animals that belong to phylum annelida are called anellids  or called segmented worms . , they…

Q: Heterocoelous centrum is a characteristics of- (A) Amphibia (B) Reptilia (C) Birds (D) Mammalia

A: Introduction - Multicellular eukaryotic animals make up the animal kingdom. Invertebrates and…

Q: a) How can Strongyloides and hookworms be differentiated in terms of their morphology? b) Why does…

A: I have answered all 3 questions with proper justification. Please follow Step- 2,3,4 for complete…

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: 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: Feeding rosettes can be observed on the surface of the sediment and are formed by A. suspension…

A: E. Deposit feeding echinoids.

Q: whihc of the following arthropod regions does not bear legs a) cephalothorax b) abdomen c) all of…

A: Most arthropod's bodies have three sections - the head, the thorax, and the abdomen.    The thorax…

Q: All of the following are true of Ctenophores except: A. Some species have long tentacles B. They…

A: Introduction:- ctenophores  are a phylum of marine invertebrates that live in sea waters all over…

Q: E7 A Moving to the next question prevents changes to this answer. Question 1 What are the two phyla…

A: Helminths are invertebrates, large macroparasites general term meaning worm. Some of helminths are…

Q: 1. Large colonies of polyps belonging to class Anthrozoa secrete hard skeletons of time which later…

A: Introduction  In biology, symmetry refers to the ordered repetition of parts in a living organism.…

Q: Which phylum is characterized by animals thathave a segmented body?(A) Cnidaria(B)…

A: Segmented body is the division of body plans in some animals in which the body is divided into the…

Q: 6. The Phylum Platyhelminthes includes: A. Roundworms B. Earthworms C. FlatwormsV D. Heartworms

A: Members of Platyhelminthes can be found free or can be parasites.

Q: In most flatworms solid waste is eliminated via the O A. anusS O B. mouth O C. nephridiopore O D. A…

A: It is a multiple choice question.

Q: Segmentation in the body is first observed in which of the following:(a) Platyhelminthes (b)…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…