Description : Assertion : Annelids, arthropods, and molluscs are protostomial coelomates . Reason : All the three phyla include members with bilateral symmetry and
Last Answer : Assertion : Annelids, arthropods, and molluscs are protostomial coelomates . Reason : All the three ... . If both Assertion and Reason are false.
Description : Which one of the following statements about certain given animals is correct? (a) Roundworms (Aschelminthes) are pseudo- coelomates. (b) Molluscs are acoelomates. (c) Insects are pseudocoelomates. (d) Flatworms (Platyhelminthes) are
Last Answer : (a) Roundworms (Aschelminthes) are pseudo- coelomates.
Description : In contrast to annelids the platyhelminthes show (a) absence of body cavity (b) bilateral symmetry (c) radial symmetry (d) presence of pseudocoel.
Last Answer : (a) absence of body cavity
Description : Which of the following animals are TRUE coelomates with bilateral symmetry?
Last Answer : Which of the following animals are TRUE coelomates with bilateral symmetry? (a) Annelids ... (c) Aschelminthes (d) Platyhelminthes
Description : Consider following features. (A) Organ system level of organisation (B) Bilateral symmetry (C) True coelomates with segmentation of body Select the correct option of animal groups which possess ... Arthropoda and Chordata (c) Annelida, Arthropoda and Mollusca (d) Arthropoda, Mollusca and Chordata
Last Answer : (B) Bilateral symmetry
Description : Bilaterally symmetrical and acoelomate animals are exemplified by (a) ctenophora (b) platyhelminthes (c) aschelminthes (d) annelida
Last Answer : (b) platyhelminthes
Description : Not all animals have a circulatory system. Poriferans, cnidarians, platyhelminthes and nematodes (in these there are the pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.
Last Answer : What is the alternative means for transport of substances in animals without a circulatory system? Why is blood important for larger animals?
Description : The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the Phylum (a) Annelida (b) Mollusca (c) Cnidaria (d) Echinodermata.
Last Answer : (d) Echinodermata.
Description : Are Platyhelminthes acoelomates, pseudocoelomates or coelomates?
Last Answer : Acoelomates
Description : In which of the following phyla, the adult shows radial symmetry while the larva has bilateral symmetry?
Last Answer : In which of the following phyla, the adult shows radial symmetry while the larva has bilateral ... Mollusca B. Cnidaria C. Echinodermata D. Annelida
Description : Match the following columns and select the correct option. Column-I Column-II (A) Gregarious, polyphagous pest (i) Asterias (B) Adult with radial symmetry and larva with bilateral symmetry (ii) Scorpion (C) Book lungs (iii) Ctenoplana ... ) (iii) (c) (iii) (ii) (i) (iv) (d) (ii) (i) (iii) (iv)
Last Answer : (b) (iv) (i) (ii) (iii)
Description : In constrast to annelids the Platyhelminthes show
Last Answer : In constrast to annelids the Platyhelminthes show A. Absence of body cavity B. Presence of pseudocoel C. Radial symmetry D. Bilaterla Symmetry
Description : How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes?
Last Answer : Annelids have a nervous system made of two ventral chords and one relatively big nervous cell concentration in its anterior portion resembling a primitive brain. Nematodes have an anterior neural ... is more outstanding than in nematodes or in flatworms. Image Diversity: earthworm nervous system
Description : Solenocytes are the main excretory structures in (a) echinodermates (b) platyhelminthes (c) annelids (d) molluscs.
Description : Choose the animals which exhibits the following characteristics (a) Marine habitat. (b) Bilateral symmetry and cephalization . ( c) Hemocoel as princi
Last Answer : Choose the animals which exhibits the following characteristics (a) Marine habitat. (b) Bilateral symmetry ... B. Dogfish C. Jellyfish D. Cuttle fish
Description : The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of ... These features have been preserved by evolution as they provide adaptive advantage to their owners.
Last Answer : How can the tubular-dorsal nervous system in chordates be compared to the nervous pattern present in invertebrates?
Description : Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? Animals Morphological features (a) Scorpion, spider, - Ventral solid ... symmetry sea anemone, sea cucumber (d) Centipede, prawn, - Jointed appendages sea urchin
Last Answer : (a) Scorpion, spider, – Ventral solid central cockroach nervous system
Description : Echinoderm identity card. How are echinoderms characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?
Last Answer : Examples of representing beings: sea cucumber, sea urchin, starfishes. Basic morphology: calcareous endoskeleton with spines, ambulacral system. Type of symmetry: secondary radial. Germ layers and ... cephalization. Types of reproduction: sexual, with larval stage. Phylum Chordata - Study Here
Description : How are the symmetry and the nervous system characterized in echinoderms?
Last Answer : Adult echinoderms, along with cnidarians, are the animals that present radial symmetry, i.e., their body structures are distributed around a center. The radial symmetry in echinoderms however ... to follow the pentaradial structure of the body. Phylum Echinodermata - Image Diversity: radial symmetry
Description : Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?
Last Answer : Examples of representing beings: planarias, schistosomes, taenias. Basic morphology: flat worm. Type of symmetry: bilateral. Germ layers and coelom: triploblastics, acoelomates. Digestive system: ... , beginning of cephalization. Types of reproduction: asexual and sexual. Phylum Nematoda Review
Description : Which one of the following groups of animals is bilaterally symmetrical and triploblastic? (a) Aschelminthes (roundworms) (b) Ctenophores (c) Sponges (d) Coelenterates (cnidarians)
Last Answer : (a) Aschelminthes (roundworms)
Description : What is bilateral symmetry in biology? -Biology
Last Answer : answer:
Description : Which one occurs in echinodermata? (a) Bilateral symmetry (b) Radial symmetry (c) Porous body (d) Soft skin
Last Answer : (b) Radial symmetry
Description : Which of the following characteristics is mainly responsible for diversification of insects on land? (a) Exoskeleton (b) Eyes (c) Segmentation (d) Bilateral symmetry
Last Answer : (a) Exoskeleton
Description : Which of the following is NOT a characteristic shared by most of the members of the kingdom plantae? a) they are multicellular b) they are nonmotile c) they possess bilateral symmetry d) there is an alternation of haploid and diploid generations
Last Answer : ANSWER: C -- THEY POSSESS BILATERAL SYMMETRY
Description : Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echinoderms. Having as research object a newly ... the hypothesis? What is an example of a discovery that would strengthen it?
Last Answer : Hypothesis to be tested: Vertebrates evolved from echinoderms. Testing material: A newly found protochordate species (i.e., a vertebrate forerunner). Example of weakening observation (that ... shows how science works, beginning with the placement of hypothesis and further observational testing.)
Description : Do echinoderms have an excretory system? How is excretion done in these animals?
Last Answer : Echinoderms do not have an excretory system. Their excretions are eliminated by diffusion.
Description : A closed circulatory system is one in which blood circulates only inside blood vessels. For this reason the blood pressure is higher in animals with closed circulatory system. The ... annelids, cephalopod molluscs and vertebrates. The Circulatory System - Image Diversity: closed circulatory system
Last Answer : What are the advantages of the closed circulatory system over the open circulatory system?
Description : Describe the characteristics of Aschelminthes.
Last Answer : Describe the characteristics of Aschelminthes.
Description : How many germ layers originate the body of platyhelminthes? In relation to this characteristic how are these animals classified?
Last Answer : Platyhelminthes are the first triploblastic animals (remember that cnidarians are diploblastic), i.e., they present three germ layers: ectoderm, mesoderm and endoderm.
Description : The figures (A - D) show four animals. Select the correct option with respect to a common characteristic of two of these animals. (A) (B) (C) (D) (a) (A) and (D) respire mainly through body wall. (b) ... . (c) (A) and (B) have cnidoblasts for self-defence. (d) (C) and (D) have a true coelom
Last Answer : (d) (C) and (D) have a true coelom.
Description : What kind of symmetry is shown in animals whose body can only be divided in one plane to show mirror images?
Last Answer : bilateral
Description : Radial symmetry is, usually, exhibited in animals which (a) are attached to the substratum (b) have one opening of alimentary canal (c) live in water (d) have ciliary mode of feeding.
Last Answer : (a) are attached to the substratum
Description : Which of the following traits is not characteristics of echinoderms ?
Last Answer : Which of the following traits is not characteristics of echinoderms ? A. Water vascular system B. Trochophore larva C. Tube feet D. Enterocoel
Description : Echinoderms are closely related to chordates due to the following characters .
Last Answer : Echinoderms are closely related to chordates due to the following characters . A. Tube- within - ... have mesodermal endoskeleton . D. All of these
Description : Which of the following statement is incorrect for echinoderms ?
Last Answer : Which of the following statement is incorrect for echinoderms ? A. The most distinctive feature ... D. They have well- developed circulatory system.
Description : Echinoderms and chordates have
Last Answer : Echinoderms and chordates have A. Pseudocoel B. Shizocoelom C. Enterocoelom D. Hemocoel
Description : Are echinoderms endothermic?
Last Answer : Yes
Description : Is there a larval stage in echinoderms?
Last Answer : In echinoderms embryonic development is indirect, with ciliated larvae.
Description : Do echinoderms present internal or external fecundation? Is there sex division among individuals?
Last Answer : The fecundation in echinoderms is external, gametes are liberated in water where fecundation occurs. The majority of echinoderms are dioecious with male and female individuals.
Description : Do echinoderms have respiratory and circulatory systems?
Last Answer : In echinoderms there are not well-defined respiratory (with the exception of the holothurian group) and circulatory systems. The ambulacral hydrovascular system plays the function of these systems.
Description : What is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordates?
Last Answer : Echinoderms and chordates are deuterostomes, i.e., in their embryonic development the blastopore turns into the anus. All other animals with complete digestive system are protostomes, i. ... digestive tube that appears in the embryonic development. Phylum Echinodermata - Image Diversity: blastopore
Description : What is the type of digestive system of echinoderms?
Last Answer : Echinoderms present a complete digestive system, with mouth and anus.
Description : What is the system that permits movement and fixation to echinoderms?
Last Answer : The system that permits movement and fixation to substrates in echinoderms is called the ambulacral system. In these animals water enters through a structure called madreporite, passes through ... emptied by water thus acting as suckers. Phylum Echinodermata - Image Diversity: ambulacral system
Description : How can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates, arthropods and molluscs?
Last Answer : The echinoderm skeleton is internal, i.e., it is an endoskeleton. It is made of calcium carbonate (calcareous). Vertebrates also have internal skeleton made of bones and cartilages. Arthropods ... of chitin, a chitinous exoskeleton. Some molluscs present a calcareous shell that works as exoskeleton.
Description : What are the basic morphological features of echinoderms?
Last Answer : Echinoderms, as the name indicates (echino = spiny, derma = skin), are creatures with spines originated from an endoskeleton. Their endoskeleton is made of calcareous plaques that besides spines ... have pentaradial symmetry; the radial symmetry in these animals is secondary, present only in adults.
Description : Under which environments do echinoderms live?
Last Answer : Echinoderms are marine animals, they live in salt water.
Description : The canal system is a characteristic feature of (a) echinoderms (b) sponges (c) helminthes (d) coelenterates.
Last Answer : (b) sponges
Description : Select the taxon mentioned that represents both marine and fresh water species. (a) Echinoderms (b) Ctenophora (c) Cephalochordata (d) Cnidaria
Last Answer : (d) Cnidaria