Which is not true about Cnidarians? A1. Some cnidarians go through polyp stages and medusa stages A. some jellyfish looking things are not in the same Cnidarian class as the true jelly fish B. anemones have a sessile lifestyle which means they stay attached to the bottom C. Cnidarian stinging cells are called choanoflagellates D. corals have symbiotic algae called zooxanthellae, that they depend upon

Q: Explain the  advantage of a digestive system with two openings have relative to digestive systems…

A: The digestive systems that is usually been define that the annelids have two openings as opposed to…

Q: What advantages favored the evolution of tapeworms’ long, flat shape?

A: Tapeworm belongs to the Phylum Platyhelminthes commonly known as flatworms. The organisms belonging…

Q: Which is not a characteristic feature of sea stars?a. coelomb. eyespotc. skin gillsd. tracheae. tube…

A: Introduction  Echinoderm is the phylum contains non-chordate invertebrate animals. They have spiny…

Q: Cnidocytes are found in _____. a. phylum Porifera b. phylum Nemertea c. phylum Nematoda d. phylum…

A: There is a great diversity of organisms in the Kingdom Animalia. It is further divided into several…

Q: Members of Chondrichthyes are thought to be descended from fishes that had.. .....................

A: Chondrichthyes includes sharks, rays, and skates, as well as sawfish and a few fish species known as…

Q: Explain how a cnidarian, such as a jellyfish, stings its prey

A: Cnidarians belong to the Radiata group of Animal kingdom.

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: 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: 40. A marine biologist asked you to look out for Echinodermata in an expedition. Which of these…

A: The first organism that is listed is a crab. It shows presence of jointed appendages and shows an…

Q: Explain the term used for Mollusc with a broad, flat foot for crawling ?

A: Molluscs are considered the second species-rich phylum in the world followed by the arthropods. This…

Q: Which statement best describes how an earthworm moves? a Contracting setae while relaxing…

A: Earthworm mobilization:                         Circular and longitudinal muscles with bristles like…

Q: Which of the following groups includes all of the others? a. Protostomes c. Eumetazoans b.…

A: Taxonomy is that the observe of distinguishing completely different organisms, classifying them into…

Q: Flatworms are the simplest animals to display a body plan that is _________.

A: BODY PLAN It  is a group of structural and developmental characteristics that can be used to…

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: 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: Discuss the ecological importance of tapeworms.

A: Answer

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: write a short conclusion about  Platyhelminthes Nematoda and Annelida

A: Platyhelminthes/ Flatworms:- They are soft bodied, flat invertebrates, most of which are parasitic…

Q: part i How many of the following are characteristics of arthropods? 1. protostome development…

A: Characteristics of arthropods (Correct options): Option 2: Arthropods are bilaterally symmetrical.…

Q: A mantle and mantle cavity are present in _____. a. class Oligochaeta b. class Bivalvia c. class…

A: The animal kingdom is separated into several phyla due to the different anatomical and physiological…

Q: What is a key characteristic of all arthropods? a. Six legs c. Hydrostatic skeleton b. Pseudocoelom…

A: Arthropoda are invertebrate animals equipped with joint appendages. It is the largest phylum of…

Q: Which features are true of sea cucumbers? A. use the water vascular system to move on the seafloor…

A: Please follow step 2 for detailed explanation.

Q: Drawing animal body plans to compare features: Draw a cross-sectional diagram comparing the animals…

A: Flatworm or Acoelomate are the animal without body cavity, they involve ectoderm,mesoderm, endoderm…

Q: Differentiate the following according to their general characteristics: a. Nematodes b. Cestodes…

A: Parasitic worms of the human gastrointestinal tracts are classified into three categories based on…

Q: Why are horseshoe crabs in the same subphylum as spiders

A: Subphylum Chelicerata is an ancient group of arthropods, which include about 75000 species. Their…

Q: Which statement about protostomes is true? O They are radially symmetrical. They have a complete…

A: The group of eukaryotic organisms that are heterotrophic and multicellular is called animals. There…

Q: Why are flatworms called acoelomates

A: Flatworms belongs to the phylum Platyhelminthes. They are unsegmented, bilaterally symmetrical…

Q: Draw a simple diagram (cross section) to distinguish between a coelomate and either a…

A: The coelom is the term used to describe a body cavity inside the body that contains and surrounds…

Q: The arms and tentacles are developed from what kind of mollusk structure? In two paragraphs,…

A: After the Arthropoda, Mollusca is the second-largest phylum of invertebrate creatures. Mollusks are…

Q: The smallest sponges are asconoid.

A: Poriferans are ordinarily referred to as sponges. they're cellular organisms with cellular level of…

Q: Which is more widespread: Annelids or Nematodes? Why do you think so?

A: Introduction There is diverse range of organisms living on earth. Some are small, microscopic such…

Q: Compare and contrast the chelicerae of spiders, scorpions, and horseshoe crabs.

A: Chelicerae looks at a collection of species including ticks, spiders, and horse crabs. The prosoma…

Q: The arthropods have a metameric body with segments organized into functional groups called

A: In this question, we have to answer a metameric  body with segments organised into functional groups…

Q: Class Bivalvia which is known as pelecypods can be found in marine and freshwater habitats. By…

A: ''Answer: The second-largest phylum of invertebrates is Mollusca and Bivalvia is one of the classes…

Q: In an ecdysozoan would cease if ecdysis did not occur.

A: Arthropoda (insects, chelicerata, crustaceans, and myriapods), Nematoda, and several smaller phyla…

Q: Cubozoans are ________. a. polyps b. medusoids c. polymorphs d. sponges

A: BASIC INFORMATION  PHYLUM CNIDARIA It is one of the phylum in the animal kingdom which constitutes…

Q: Describe t sehe advantages favored the evolution of tapeworms' long, flat shape.

A: "Flatworms" are the term used to describe the members of the phylum Platyhelminthes. The flatworms…

Q: Which is INCORRECT about sea urchins? A. Spines are movable B. Secondary spine is shorter a d solid…

A: Sea Urchins are echinoderms having a spiny outer structure.  They move with the help of tube feet…

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: probably Choose a or b a. provide fish with jaws in order to be fearful predators. b. store calcium…

A: Bones are the structures present in the body of vertebrates. Bones provide structure to the body and…

Q: Differentiate Nematodes, Cestodes and Trematodes. Tabulate your answers. Give 8-10 points of…

A: Differentiation:          Morphologic differences                   Nematodes…

Q: Leuconoid organization in sponges is correlated with large body size small body size minimal surface…

A: Leuconoid is one of three body organization category of sponges. They are most complex and largest…

Q: List two characteristics, which help us to distinguish Nematodes from Annelids.

A: Invertebrates  Invertebrates are animals that do not have vertebral column. Ex- annelida, molluscs,…

Q: Which clade does not include humans?(A) synapsids(B) lobe-fins(C) diapsids(D) osteichthyans

A: Clades are the group of organisms that are classified on their shared traits with their common…

Q: Which are not classified as molluscs? Answer Clams Squids Lobsters Nautiluses

A: Molluscs are found in the phylum invertebrate. Molluscs have three parts in their body: Head: It…

Q: Which would be found in both flatworms and cnidarians? a digestive system with a single opening a…

A: Phylum Cnidaria include all marine species like corals, jelly fish and Hydra and have a bilateral…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.