Mollusc identity card. How are molluscs 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?

Mollusc identity card. How are molluscs 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?
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Examples of representing beings: snails, sea slugs, octopuses, squids, mussels, oysters. Basic morphology: soft body, with or without calcareous shell. Type of symmetry: bilateral. Germ layers and coelom: triploblastics, coelomates. Digestive system: complete. Respiratory system: branchial or, in terrestrial gastropods, lungs. Circulatory system: open or, in cephalopods, closed. Excretory system: nephridia. Nervous system: ganglial, advanced cephalization in cephalopods. Types of reproduction: sexual. Phylum Echinodermata Review
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Description : Concerning germ layers and the presence of coelom how are arthropods characterized?

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Description : Insecticides are specific inhibitors of— (A) Excretory system (B) Digestive system (C) Nervous system (D) Blood Circulatory system

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Description : Are mollusc metameric beings? Exclusively analyzing this feature could it be said that molluscs are evolutionarily proximal to nematodes or to annelids?

Last Answer : In molluscs there is not a body divided into segments. Considering just this feature it could be said that evolutionarily they are more proximal to nematodes than to annelids.

Which body system coordinates activities of body parts by releasing hormones into the blood? A) nervous system B) digestive system C) respiratory system D) circulatory system E) endocrine system

Description : Which body system coordinates activities of body parts by releasing hormones into the blood? A) nervous system B) digestive system C) respiratory system D) circulatory system E) endocrine system

Last Answer : E) endocrine system

Into which classes are mollusc divided? What are some representing beings of each class?

Description : Into which classes are mollusc divided? What are some representing beings of each class?

Last Answer : The phylum Mollusca is divided into five main classes: pelecypods, or bivalves (Pelecypoda, or Bivalvia), includes oysters, clams, mussels; gastropods (Gastropoda), snails, sea slugs ... are a few other mollusc classes. Mollusca - Image Diversity: pelecypods gastropods cephalopodsscaphopods chitons

What two systems help us get nutrients from our food and deliver them throughout our body? a) Respiratory and Nervous b) Digestive and Circulatory c) Circulatory and Respiratory d) Respiratory and Digestive

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Last Answer : b) Digestive and Circulatory

How is the excretory system of molluscs characterized?

Description : How is the excretory system of molluscs characterized?

Last Answer : Molluscs have one or two pair of spongelike nephridia, similar to kidneys.

Which type of circulatory system do molluscs have? How can it be compared to the respiratory system of annelids?

Description : Which type of circulatory system do molluscs have? How can it be compared to the respiratory system of annelids?

Last Answer : Molluscs, with the exception of cephalopods, have an open circulatory system, i.e., the blood circulates within vessels, from the heart, but it also fills open lacunas or cavities. In ... .e., the blood circulates only inside blood vessels. Mollusca - Image Diversity: mollusc circulatory system

How is the respiratory system in aquatic molluscs characterized? What adaptive respiratory structure do terrestrial molluscs present?

Description : How is the respiratory system in aquatic molluscs characterized? What adaptive respiratory structure do terrestrial molluscs present?

Last Answer : Aquatic molluscs oxygenate their blood through gills in direct contact with water. In terrestrial molluscs the rich vascularity under the mantle cavity absorbs air doing the role of a primitive lung. Mollusca - Image Diversity: mollusc respiratory system

What is the function of the feet in molluscs? How is the mollusc foot related to the name given to the classes of the phylum?

Description : What is the function of the feet in molluscs? How is the mollusc foot related to the name given to the classes of the phylum?

Last Answer : The mollusc foot has the function of locomotion, support, fixation, digging in the environment and sometimes of holding prey. The terminations of the names given to the main mollusc classes come from the Greek ... -shaped feet (ax in Greek is pelekys ); in cephalopods the feet are near the head.

Do sponges have nervous, circulatory and excretory systems?

Description : Do sponges have nervous, circulatory and excretory systems?

Last Answer : Sponges do not have a nervous system neither circulatory system nor excretory system.

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

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

Hypersensitivity refers to undesirable reactions produced by a) circulatory system b) Respiratory system c) Immune System d) Endocrine system e) Autonomic nervous system

Description : Hypersensitivity refers to undesirable reactions produced by a) circulatory system b) Respiratory system c) Immune System d) Endocrine system e) Autonomic nervous system

Last Answer : Ans: C

Chemical regulation of the body involves which system: a) lymphatic b) respiratory c) circulatory d) nervous e) endocrine

Description : Chemical regulation of the body involves which system: a) lymphatic b) respiratory c) circulatory d) nervous e) endocrine

Last Answer : ANSWER: E -- ENDOCRINE

Deficiency of pantothenic acid in human beings can affect (A) Nervous system (B) Digestive system (C) Both (A) and (B) (D) None of these

Description : Deficiency of pantothenic acid in human beings can affect (A) Nervous system (B) Digestive system (C) Both (A) and (B) (D) None of these

Last Answer : Answer : C

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?

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

In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Description : In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Last Answer : ANSWER: C

In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Description : In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Last Answer : ANSWER: C

In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Description : In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Last Answer : ANSWER: C

In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Description : In human body Gall Bladder is part of the _________ system. A. Nervous B. Reproductory C. Digestive D. Respiratory

Last Answer : ANSWER: C

How is the respiratory system of beings of the phylum Annelida characterized?

Description : How is the respiratory system of beings of the phylum Annelida characterized?

Last Answer : Respiration in annelids can be cutaneous or branchial. Cutaneous respiration occurs due to the rich vascularity under the epidermis. The gills, present in aquatic annelids, are located in the parapodia (false claws) that have an extensive capillary net. Image Diversity: annelid respiratory system

How is the circulatory system of reptiles characterized? What is the basic difference between the reptile and the amphibian heart?

Description : How is the circulatory system of reptiles characterized? What is the basic difference between the reptile and the amphibian heart?

Last Answer : The circulatory system of beings of the class Reptilia is similar to the amphibian, closed and incomplete. Although the heart presents three chambers (two atria and one ventricle) in reptiles ... septation and the mixture of arterial with venous blood is lessened. Image Diversity: reptilian heart

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 cellularity of the blood is also higher with many specific blood cells. The closed circulatory system is a feature of annelids, cephalopod molluscs and vertebrates. The Circulatory System - Image Diversity: closed circulatory system

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?

Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. In the open circulatory system the blood pressure is low and generally the blood (called hemolymph) has low cellularity. Arthropods, molluscs (the cephalopods are exception) and protochordates have open circulatory system. The Circulatory System - Image Diversity: open circulatory system

Description : Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. In the open circulatory system ... and protochordates have open circulatory system. The Circulatory System - Image Diversity: open circulatory system

Last Answer : What is a closed circulatory system?

What is the type of digestive system in molluscs?

Description : What is the type of digestive system in molluscs?

Last Answer : Molluscs present extracellular digestion and a complete digestive system, with mouth and anus.

In the given table which phyla is correctly matched with its levels of organisation, symmetry and coelom ?

Description : In the given table which phyla is correctly matched with its levels of organisation, symmetry and coelom ?

Last Answer : In the given table which phyla is correctly matched with its levels of organisation, symmetry and coelom ?

Select incorrect matching of animlas, their body symmetry , and coelom.

Description : Select incorrect matching of animlas, their body symmetry , and coelom.

Last Answer : Select incorrect matching of animlas, their body symmetry , and coelom.

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) (B) and (C) show radial symmetry. (c) (A) and (B) have cnidoblasts for self-defence. (d) (C) and (D) have a true coelom

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.

Solenocytes are the main excretory structures in (a) echinodermates (b) platyhelminthes (c) annelids (d) molluscs.

Description : Solenocytes are the main excretory structures in (a) echinodermates (b) platyhelminthes (c) annelids (d) molluscs.

Last Answer : (b) platyhelminthes

How are animals classified according to the germ layers present in their embryonic development ?

Description : How are animals classified according to the germ layers present in their embryonic development ?

Last Answer : Cnidarians are diploblastic, i.e., they present only endoderm and ectoderm. With the exception of poriferans, all remaining animals are triploblastic. Poriferans do not present differentiated tissue ... not classify regarding germ layers (although sometimes they are mentioned as diploblastic).

How are animals classified according to the germ layers present in their embryonic development ?

Description : How are animals classified according to the germ layers present in their embryonic development ?

Last Answer : Cnidarians are diploblastic, i.e., they present only endoderm and ectoderm. With the exception of poriferans, all remaining animals are triploblastic. Poriferans do not present differentiated tissue ... not classify regarding germ layers (although sometimes they are mentioned as diploblastic).

Assertion : Annelids, arthropods, and molluscs are protostomial coelomates . Reason : All the three phyla include members with bilateral symmetry and

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.

Ascaris is characterized by (a) presence of true coelom but absence of metamerism (b) presence of true coelom and metamerism (metamerisation) (c) absence of true coelom but presence of metamerism (d) presence of neither true coelom nor metamerism.

Description : Ascaris is characterized by (a) presence of true coelom but absence of metamerism (b) presence of true coelom and metamerism (metamerisation) (c) absence of true coelom but presence of metamerism (d) presence of neither true coelom nor metamerism.

Last Answer : (d) presence of neither true coelom nor metamerism.

How is the nervous system of molluscs organized?

Description : How is the nervous system of molluscs organized?

Last Answer : Molluscs have well-developed sensory structures. It is accepted that cephalopods, like octopus and squid, have eyes with image formation. Snails have antennae and a pair of well-defined ... molluscs and neurons concentrate in a ganglial pattern. Mollusca - Image Diversity: mollusc nervous system

How can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates, arthropods and molluscs?

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.