What evidence suggests that ancestral echinoderms were sessile?

Q: Give the resemblances between the lancelet and the lamprey's larva?

A: The lancelet belongs to the kingdom Animalia and characterized as "fish-like" benthic filter-feeding…

Q: Why are echinoderms used as indicator species in marine environments?

A: Echinoderms are marine organisms that belong to the phylum Echinodermata. The name is derived from…

Q: Echinoderms have _____ symmetry as embryos and _____ symmetry as adults. a. radial; radial c.…

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

Q: Which organ system is responsible for locomotion in the sea star/echinoderms?

A: Echinoderms have the following characteristics- 1. They are triploblastic. 2. They are radially…

Q: How can the features of the arthropod exoskeleton explain the terrestrial adaptation of some species…

A: The phylum Arthropoda is characterized by the presence of jointed legs, a segmented body, and an…

Q: What symmetry is represented in echinoderms?

A: There are three types of symmetry- 1. Bilateral symmetry- means that the organism when cut…

Q: Why is the madreporite of sea cucumbers internal instead of external like other echinoderms?

A: The madreporite  is made up of calcium carbonate and is covered in pores, looks grooved like some…

Q: What constellation of characteristics possessed by echinoderms occurs in no other phylum?

A: Echinoderms are an extremely ancient group of creatures reaching out rear to the Cambrian time…

Q: Do echinoderms have respiratory and circulatory systems?

A: Echinoderms have a calcareous endoskeleton with organ-system organization. They are triploblastic…

Q: Explain the difference between mictic and amictic eggs of rotifers. What is the adaptive value of…

A: The members of the phylum Rotifera have can range in the length from 40 micrometers to 3…

Q: How are the echinoderms significant to the marine environment? Relate some (at least two) of their…

A: Echinoderms -- Echinoderms are the members of the phylum Echinodermata . Animals have numerous…

Q: Explain the Characteristics of Echinoderms ?

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

Q: What environment would you find an echinoderm?

A: Echinoderms have the following characteristics- 1. They are bilaterally symmetrical. 2. They have a…

Q: How do chordates reproduce?

A: Chordates are the animals that have a notochord, a nerve cord, pharyngeal gill slits and post anal…

Q: Explain why echinoderms are more closely related tochordates than invertebrates.

A: Phylum Echinodermata include marine bottom-dwellers such as sea stars, sea lilies, sea urchins,…

Q: Contrast the skeleton of an echinoderm with that of an arthropod.

A: The kingdom “Animalia” has several phyla (taxonomic rank: phylum). The organisms of this kingdom are…

Q: What are four distinguishing characteristics of chordates?

A: The four qualities of chordates are a notochord, dorsal, pharyngeal cuts (or pockets), and postanal…

Q: What are the basic morphological features of echinoderms?

A: The Echinodermata is a phylum in the kingdom Animalia and the members of this phylum is called…

Q: What evidence suggests that radial symmetry in echinoderms was secondarily derived?

A: Radial symmetry means that you cut an organism along any diagonal you will get two equal halves of…

Q: Identify the distinguishing characteristics of echinoderms.

A: Step 1 Kingdom Animalia or metazoan includes all animals of the two kingdom classification except…

Q: Describe how the features and diversity of echinoderms illustrate the unity of life, the diversity…

A: Echinoderms are the members of phylum Echinodermata. It represents a major group that contains…

Q: based on the picture, what is the synamorphic character of echinoderms and hemichordates?

A: A synapomorphy is a shared, derived trait shared by an ancestor and its progeny. A character, often…

Q: Describe the endoskeleton and other adaptations seen in echinoderms.

A: Endoskeleton: An endoskeleton is a skeleton that found and develops within the interior of the body…

Q: Do echinoderms present with cephalization?

A: Cephalization is the formation of a central nervous system in organisms. Cephalization is important…

Q: Give the structure of a reptilian claw?

A: Class Reptilia includes the creeping- burrowing cold-blooded vertebrates bearing epidermal scales…

Q: Explain syncytial blastoderm?

A: In most of the insects, superficial cleavage occurs in which the mitosis occurs without cytokinesis,…

Q: What kind of nervous system is present in the echinoderms?

A: Cephalization is the formation of a central nervous system in organisms.  Echinoderms do not present…

Q: What is the type of digestive system of echinoderms?

A: Jacob Klein (1738) introduced the name Echinodermata meaning Spiny Skinned Animals. Digestive tract…

Q: c. Describe the mechanism of sea stars' regeneration. d. Give four examples of how echinoderms are…

A: Sea stars are star shaped fish organism of phylum Echinodermata and class of Asteroidea. It has the…

Q: What are some representatives of the echinoderm phylum?

A: The representatives of phylum Echinodermata are known as echinoderms. 'Echinos' means spine and…

Q: How do we know that echinoderms were derived from an ancestor with bilateral symmetry?

A: Echinoderms got this name from Greek word echinos means spiny and dermos  means skin. Phylum…

Q: What is the system that permits movement and fixation to echinoderms?

A: These form a well defined and successful group of marine animals which live at the bottom of all…

Q: How has paedomorphosis been important to evolutionary diversifi-cation of salamanders?

A: Phylogenetic evolutionary history consists of the analysis of the sequences of the common ancestors…

Q: Echinoderms are characterized by their spiny skin. What are these spines made of, and from what do…

A: Echinodermata are marine organisms with organ system level of organization. The adult echinoderms…

Q: is the presence of notochord considered as plesiomorphic character chordates? yes or no?

A: no,the presence of notochord are not considered as plesiomorphic character chordates. It is…

Q: Give four examples of how echinoderms are important to humans

A: The animal kingdom is very large. It consists of a wide variety of animals that differ from each…

Q: Give the economic importance of Hemidactylus?

A: Hemidactylus is a genus that includes different types of geckos. It contains about 168 species of…

Q: Which group of echinoderms has a biradial symmetry and tube feet all over its body?

A: Tube feet are one of the little adaptable or flexible cylindrical processes which present in the…

Q: How are the symmetry and the nervous system characterized in echinoderms?

A: Echinoderms are marine invertebrates that includes bilateral animals like star fish, sea urchins,…

Q: Compare and contrast the symmetry and body shape of the different classes of echinoderms.

A: Phylum Echinodermata has five classes 1. Asteroidea (sea stars) 2. Ophiuroidea (brittle stars) 3.…

Q: How are the three main arthropod classes characterized according to the presence of antennae?

A: Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as…

Q: Do echinoderms present internal or external fecundation? Is there sex division among individuals?

A: Fecundation, also known as fertilization involves the physical union of the male and female gamete…

Q: Which features of amphibians restrict mostspecies to living in aquatic or moist terrestrialhabitats?

A: Amphibians are vertebrate tetrapods undergo mixing of aquatic and terrestrial phases that are…

Q: Describe the acrosomal reaction in an echinoderm like the purple sea urchin, Strongylocentrotus…

A: Echinoderms are a group of marine invertebrates that belong to the phylum Echinodermata, and has a…

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.