Which of the following characteristics is not seen in the phylum Platyhelminthes?a. cephalizationb. the presence of a mesodermc. specialization of the digestive tractd. bilateral symmetry

Q: Compared to other actinopterygians, teleosts _____. reach sexual maturity later in life and live…

A: Actinopterygian refers to bony fishes which appeared during the Triassic period (50.6 million years…

Q: Which of the following is NOT present in all Annelids? O complete alimentary canal O coelom O…

A: The annelids, commonly known as ringed worms or segmented worms, are a vast phylum that includes…

Q: Segmentation in the earthworm is not exemplified bya. body rings.b. coelom divided by septae.c.…

A: Earthworm is a reddish brown terrestrial invertebrate that inhabits the upper layer of the moist…

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: This TRUE of enterocoely. O Results in the formation of coelom. O Results in processes in protostome…

A: Embryonic development refers to the development of a multicellular embryo from a fertilized egg.…

Q: What is the tissue origin of the following: Placoid Scales Cosmoid Scales Ganoid scales Cycloid…

A: scales in fishes.

Q: Which of the following applies to a squid? a. Cephalization c. Complete digestive tract b. True…

A: The differentiation of the anterior end into the head is known as cephalization. It is associated…

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: The anteriormost nonsegmental body region of an annelid is the prostomium acron O pygidium O…

A: Phylum annelida exhibits great diversity of body form, body is elongated bilateral symmetrical and…

Q: Bilateral symmetry and the anus forming at or near the site of the blastopore characterize…

A: Deuterostomes are those animals in which anus of digestive tract is developed first before the…

Q: Many arthropods have multiple distinct life stages. True False

A: Answer: The right option is: TRUE

Q: The presences of which of the following anatomicals would best distinguish a gastropod from a…

A: An organism refers to a living thing that has an organized structure which can react to stimuli,…

Q: The echinoderms lack many of the characteristics of later deuterostomes, such as pharynoeal sits and…

A: Deuterostomes possess a group of animals that have an anus before their mouth in embryonic stages.…

Q: Some evidence suggests that members of Acoelomorpha constitute the sister group for all other…

A: Acoelomorphs are small, flatworms whose length is less than 5 mm. This group comprises around 350…

Q: You find a polychaete in the lower Chesapeake Bay and discover that its coelom is unpartitioned. You…

A: Introduction Polychaeta, Often Known As Bristle Worms Or Polychaetes, Is A Paraphyletic Class Of…

Q: Flatworms (platyhelminthes) possess a a. metanephridial system  b. protonephridial system c.…

A: Platyhelminthes are flatworms having many classes of triploblastic and are acoelomate flatworms that…

Q: You find an animal and determine that it has a partitioned coelom. You can then predict that these…

A: The coelom means a body cavity or hollow structure that contains the digestive tract and mani…

Q: Briefly explain why the classification of adult Urochordates used to cause great confusion in the…

A: Urochordata also known as tunicata, belongs to the marine invertebrates.

Q: Describe the differences between protonephridia and metanephridia. Give an example of any animal…

A: Photonephridia Metanephridia Ciliated or flagellated cells called flame cells are used in…

Q: The coelom a. is a synapomorphy for the clade comprising protostomes and deuterostomes. b.…

A: A body cavity is any space or compartment, or possible space in the creature body. Cavities oblige…

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: Annelid anatomy can be described as “a tube withina tube.” Explain.

A: Annelids are a phylum of worms with invertebrates. They are the worms which are segmented, with over…

Q: Compare the reproductive system of an earthworm with that of Ascaris. Be sure to note both…

A: Both ascaris and earthworms are kind of worms. Earthworms are beneficial to the soil,and ascaris is…

Q: Nematodes and arthropods both (develop an anus from the blastopore formed during…

A: Nematode and arthropods fall under one same ancestor clade i.e. Ecdysozoa.  Nematodes are roundworms…

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: To describe the feature that distinguish chrodates from other animals.

A: In the kingdom Animalia, there are two taxa: chordates and vertebrates. Animalia is a kingdom that…

Q: Aquatic molluscs have a blood vascular system & metanephridia so they must also possess a…

A: The Mollusca Phylum has over 160,000 species, 90,000 of which are still alive. Some shells were…

Q: Which of the following things is/are true about this organism? O Phylum Chordata O Agnathan Class…

A: Introduction The given image shows a Sea lamprey. The sea lamprey is a parasitic lamprey native to…

Q: What type of a body plan doescoelenterates, ctenophores andechinoderms have?A. Annelida…

A: The animals are the most abundant living organism that are found in almost every habitat. They have…

Q: The class of annelid worms which differs from all other classes of annelid worms in that it lacks an…

A: Phylum name: Annelida, commonly known as segmented worm, is a phylum of invertebrates that includes…

Q: Coelomates are Multiple Choice animals that have no coelom. animals that have two coeloms. animals…

A: Animals are the multicellular eukaryotic organisms that form the biological kingdom Animalia. With…

Q: Coelomate animals with a partitioned coelom likely possesses. a metanephridial system secretion…

A: Answer - Both proto and metanephridia

Q: Xenacoelomorpha are characterized by all of the following except: protonephridia hermaphroditism…

A: Xenacoelomorpha is a invertebrate belonging to a small phylum and have two sister groups namely…

Q: Class Enoplea Order Trichocephalida Genus Trichinella spiralis

A: A single worm is termed trichnia, which is Greek for "hairlike," and larvae are distinguished by…

Q: Identify the phylum/class of invertebrate that matches this description: These animals lack a…

A: Helminths are worm-like parasites that live by feeding on the living host. They gain protection and…

Q: Although tunicate larvae have a notochord, adult tunicates do not. The reason for this is; The…

A: Even though Tunicates come under the category of Chordates but they do not have notochord.

Q: Members of the phylum Platyhelminthes have two body forms: free-swimming medusa and stationary…

A: The phylum Platyhelminths includes the soft bodies worms that are bilateral and unsegmented…

Q: Annelids (include leeches, earthworms and polychaete worms/ use their coeloms as hydrostatic…

A: Annelida is a group of segmented worms. They have a long and segmented body. Annelids are…

Q: If an animal has coelom, you also would expect it to exhibit: cephalization bilateral symmetry a…

A: The coelom is the fundamental body cavity in many animals and is situated inside the body to…

Q: Which of the following is true about Sea urchin blastula formation and fate map? a) ectoderm that…

A: Sea urchins are spiny, round echinoderms in class Echinoidea. They show external fertilization and…

Q: Describe the characteristic of protostomes; be able to differentiate them from deuteronstomes

A: Metazoans are groups of animals that have specified cells for various organs and tissues. These…

Q: Coelom formation in Deuterostomes is ____________ whereas in Protostomes is _____________.

A: Metazoans are classified into deuterostomes and protostomes due to their different embryonic…

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: Class Cephalopoda is unique among the classes in Phylum Mollusca in that (they undergo direct…

A: Cephalopods belong to the phylum Mollusca. They are exclusively marine in nature and are…

Q: State the similarities and differences between phylum Annelida, Nematoda and Platyhelmintes.

A: These are the worms which blongs to phylum annelida. These are long, thing creatures without legs.

Q: Compare and contrast the three "worm" phyla (Platyhelminthes, Nematoda and Annelida).

A: Worms refer to the animals that have characteristically cylindrical long body devoid of limbs and…

Q: Triploblastic animals that lacks a through-gut and coelom

A: Triploblastic organisms are the ones that are developed from three germ layers. These layers are…

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…

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.