In chordates the nervous system is dorsal and highly cephalized while in most invertebrates the nervous system is ganglial and ventral.

In chordates the nervous system is dorsal and highly cephalized while in most invertebrates the nervous system is ganglial and ventral.
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What is the group of the phylum Chordata that first colonized the terrestrial environment?
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If the head of cockroach is removed, it may live for few days because (a) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen (b) the cockroach does not have nervous system(c) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body (d) the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

Description : If the head of cockroach is removed, it may live for few days because (a) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen (b) the cockroach does not have nervous ... a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

Last Answer : (c) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body

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 neurons in the brains and the spinal cord (central nervous system, CNS) allowed the increase of the interaction complexity between these animals and the environment. Receptor (afferent conduction) and efferent (motor, regulatory and behavioral reactions) functions come out more sophisticated in chordates due to the presence of more well-developed neural networks. These features have been preserved by evolution as they provide adaptive advantage to their owners.

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?

Is the tubular-dorsal nervous system of chordates associated to radial or lateral symmetry?

Description : Is the tubular-dorsal nervous system of chordates associated to radial or lateral symmetry?

Last Answer : How does that explain the complexity level of the nervous system reached by the vertebrate evolutionary branch?

Important characteristic that hemichordates share with chordates is (a) ventral tubular nerve cord (b) pharynx with gill slits (c) pharynx without gill slits (d) absence of notochord.

Description : Important characteristic that hemichordates share with chordates is (a) ventral tubular nerve cord (b) pharynx with gill slits (c) pharynx without gill slits (d) absence of notochord.

Last Answer : (b) pharynx with gill slits

An important characteristic that Hemichordates share with Chordates is : (1) Ventral tubular nerve cord (2) Pharynx with gill slits (3) Pharynx without gill slits (4) Absence of notochord

Description : An important characteristic that Hemichordates share with Chordates is : (1) Ventral tubular nerve cord (2) Pharynx with gill slits (3) Pharynx without gill slits (4) Absence of notochord

Last Answer : (2) Pharynx with gill slits

Correct combination for the parts of thorasic cavity and their position is :- `{:((A),"Ribs",(i),"Ventral"),((b),"Diaphragm",(ii),"Dorsal"),((c),"vert

Description : Correct combination for the parts of thorasic cavity and their position is :- `{:((A),"Ribs",(i),"Ventral"),((b),"Diaphragm",(ii),"Dorsal"),((c),"vert

Last Answer : Correct combination for the parts of thorasic cavity and their position is :- `{:((A),"Ribs",(i),"Ventral"),((b)," ... B-(iii), C-(ii), D-(i), E-(iv)

Label the given figures representing ventral and dorsal view of Gonyaulax.

Description : Label the given figures representing ventral and dorsal view of Gonyaulax.

Last Answer : Label the given figures representing ventral and dorsal view of Gonyaulax.

After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described ?

Description : After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described ?

Last Answer : In a schematic longitudinal section of the embryo after the neurula stage, the outermost layer of cells is the ectoderm. In the ventral region comes the archenteron tube formed of endodermal cells. In both ... is the notochord. In the dorsal region just above the notochord lies the neural tube.

After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described ?

Description : After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described ?

Last Answer : In a schematic longitudinal section of the embryo after the neurula stage, the outermost layer of cells is the ectoderm. In the ventral region comes the archenteron tube formed of endodermal cells. In both ... is the notochord. In the dorsal region just above the notochord lies the neural tube.

During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called (a) organiser phenomena (b) axis formation (c) anamorphosis (d) pattern formation.

Description : During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called (a) organiser phenomena (b) axis formation (c) anamorphosis (d) pattern formation.

Last Answer : (a) organiser phenomena

Which of the following characters is absent in all chordates? (a) Diaphragm (b) Coelom (c) Pharyngeal gill clefts (d) Dorsal nerve cord

Description : Which of the following characters is absent in all chordates? (a) Diaphragm (b) Coelom (c) Pharyngeal gill clefts (d) Dorsal nerve cord

Last Answer : (a) Diaphragm

Ladder like nervous system with ventral nerve chord is present in

Description : Ladder like nervous system with ventral nerve chord is present in

Last Answer : Ladder like nervous system with ventral nerve chord is present in A. Cnidaria B. Plathyhelminthes C. Annelida D. Arthropoda

Which one of the following is a matching pair of a body feature and the animal possessing it? (a) Ventral central – Leech nervous system (b) Pharyngeal gill slits – Chamaeleon absent in embryo (c) Ventral heart – Scorpion (d) Post-anal tail – Octopus

Description : Which one of the following is a matching pair of a body feature and the animal possessing it? (a) Ventral central – Leech nervous system (b) Pharyngeal gill slits – Chamaeleon absent in embryo (c) Ventral heart – Scorpion (d) Post-anal tail – Octopus

Last Answer : (a) Ventral central – Leech nervous system

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 central cockroach nervous system (b) Cockroach, locust, – Metameric Taenia segmentation(c) Liver fluke, – Bilateral symmetry sea anemone, sea cucumber (d) Centipede, prawn, – Jointed appendages sea urchin

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

With regard to the autonomic nervous system: a. the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves b. the preganglionic sympathetic fibres are usually longer than preganglionic parasympathetic fibres c. acetylcholine is the neurotransmitter at the ganglia of both sympathetic and parasympathetic nervous system d. botulin toxin blocks acetylcholine receptors

Description : With regard to the autonomic nervous system: a. the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves b. the preganglionic sympathetic fibres ... the ganglia of both sympathetic and parasympathetic nervous system d. botulin toxin blocks acetylcholine receptors

Last Answer : the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves

Select the correct option with respect to cockroaches. (a) Malpighian tubules convert nitrogenous wastes into urea. (b) Males bear short anal styles not present in females. (c) Nervous system comprises of a dorsal nerve cord and ten pairs of ganglia. (d) The forewings are tegmina which are used in fligh

Description : Select the correct option with respect to cockroaches. (a) Malpighian tubules convert nitrogenous wastes into urea. (b) Males bear short anal styles not present in females. (c) Nervous system comprises of a ... cord and ten pairs of ganglia. (d) The forewings are tegmina which are used in fligh

Last Answer : (b) Males bear short anal styles not present in females

Which of the following statements are true for the Phylum Chordata? (A) In Urochordata, notochord extends from head to tail and it is present throughout their life. (B) In Vertebrata, notochord is present during the embryonic period only. (C) Central nervous system is dorsal and hollow. (D) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata. (a) (D) and (C) (b) (C) and (A) (c) (A) and (B) (d) (B) and (C)

Description : Which of the following statements are true for the Phylum Chordata? (A) In Urochordata, notochord extends from head to tail and it is present throughout their life. (B) In Vertebrata, notochord is present during the embryonic period only. (C ... (C) (b) (C) and (A) (c) (A) and (B) (d) (B) and (C)

Last Answer : (d) (B) and (C)

Which one of the following is not a characteristic of Phylum Annelida? (a) Pseudocoelom (b) Ventral nerve cord (c) Closed circulatory system (d) Segmentation

Description : Which one of the following is not a characteristic of Phylum Annelida? (a) Pseudocoelom (b) Ventral nerve cord (c) Closed circulatory system (d) Segmentation

Last Answer : (a) Pseudocoelom

How can I preserve a hard bodied invertebrates body?

Description : How can I preserve a hard bodied invertebrates body?

Last Answer : here is a link to an article that takes you through it step by step. http://www.ehow.com/how_2228333_preserve-hardbodied-insects.html. A simple google search of preserve insect brought that up ... on fluther as opposed to running it through google. anyhow, happy mounting and sorry for your loss.

How many episodes of invertebrates ?

Description : How many episodes of invertebrates ?

Last Answer : Episode 7 of invertebrates.

How many episodes are invertebrates ?

Last Answer : The animals of the 6 episodes are invertebrates.

Phylum Mollusca can be distinguished from other invertebrates by the presence of

Description : Phylum Mollusca can be distinguished from other invertebrates by the presence of

Last Answer : Phylum Mollusca can be distinguished from other invertebrates by the presence of A. Bilateral symmetry and ... body D. A mantle and non-segmented body

Which statement best explains why invertebrates regenerate lost tissue more readily than most vertebrates do?

Description : Which statement best explains why invertebrates regenerate lost tissue more readily than most vertebrates do?

Last Answer : Which statement best explains why invertebrates regenerate lost tissue more readily than most ... undifferentiated cells than vertebrate animals have.

How do the groups of invertebrates differ?

Description : How do the groups of invertebrates differ?

Last Answer : all added together

Is a octopus a invertebrates or a vertebrates?

Description : Is a octopus a invertebrates or a vertebrates?

Last Answer : An octopus is an invertebrate.

What are the 7 types of invertebrates?

Description : What are the 7 types of invertebrates?

Last Answer : They are:Sponges (Porifera)Comb jellies (Ctenophora)Hydras, jellyfishes, sea anemones, and corals (Cnidaria)Starfishes, sea urchins, sea cucumbers (Echinodermata)Flatworms (Platyhelminthes)Round or threadworms (Nematoda)Earthworms and leeches (Annelida)

The po lysacchar ide found in the exoskeleton of invertebrates is (A) Pectin (B) Chitin (C) Cellulose (D) Chondroitin sulphate

Description : The po lysacchar ide found in the exoskeleton of invertebrates is (A) Pectin (B) Chitin (C) Cellulose (D) Chondroitin sulphate

Last Answer : B

All the following are invertebrates except (a) Snail (b) Crab (c) Prawn (d) Fish

Description : All the following are invertebrates except (a) Snail (b) Crab (c) Prawn (d) Fish

Last Answer : Ans:(d)

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 found protochordate species, what is an example of a discovery that would weaken the hypothesis? What is an example of a discovery that would strengthen it?

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.)

Differentiate between the following pairs. (a) Radiotherapy & Chemotherapy (b) Penumbra & Umbra (c) Springtides & Neaptides (d) Vertebrates &. Invertebrates (e) Fluorescent light & Neon signs

Description : Differentiate between the following pairs. (a) Radiotherapy & Chemotherapy (b) Penumbra & Umbra (c) Springtides & Neaptides (d) Vertebrates &. Invertebrates (e) Fluorescent light & Neon signs

Last Answer : (a) Radiotherapy & Chemotherapy Radiotherapy: Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells. Radiotherapy may be ... Crookes tube), which is a glass tube for demonstrating the principles of electrical discharge.

What are invertebrates? Write the name of their groups?

Description : What are invertebrates? Write the name of their groups?

Last Answer : The group of animals, which do not have vertebral column. There are twelve million kinds of invertebrates are present. Their groups are as under: - i) Phylum Protozoa ii) Phylum ... Phylum Nematoda vi) Phylum Annelida vii) Phylum Mollusca viii) Phylum Arthropoda ix) Phylum Echinodermata

Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively? A B C D A B C D (a) Insects Crusta- Other Molluscs ceans animal groups (b) Crustaceans Insects Molluscs Other animal groups (c) Molluscs Other Crusta- Insects animal ceans groups (d) Insects Molluscs Crusta- Other animal ceans groups

Description : Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively? A B C D A B C D (a) Insects Crusta- ... Molluscs Other Crusta- Insects animal ceans groups (d) Insects Molluscs Crusta- Other animal ceans groups

Last Answer : (d) Insects Molluscs Crusta- Other animal ceans groups

In which of the following animals post anal tail is found? (a) Earthworm (b) Lower invertebrates (c) Scorpion (d) Snake

Description : In which of the following animals post anal tail is found? (a) Earthworm (b) Lower invertebrates (c) Scorpion (d) Snake

Last Answer : (d) Snake

“Octopus are the first invertebrates to be seen using tools. It signifies intelligence on a greater scale than previously thought.”

Description : “Octopus are the first invertebrates to be seen using tools. It signifies intelligence on a greater scale than previously thought.” 

Last Answer : Octopuses have varied personalities and intelligence they show in myriad ways: endless trickery to escape enclosures and get food; jetting water playfully to bounce objects like balls; and ... , watching them solve problems and deciphering the meaning of their colour-changing camouflage techniques.

What was your or another's outcome after ventral/incisional hernia repair?

Description : What was your or another's outcome after ventral/incisional hernia repair?

Last Answer : Anyone else wonder why she put this in Social?

which of the following is the smallest taxonomic grounp of animals having a cranium , vertabral column , ventral heart , pulmonary respiration and two

Description : which of the following is the smallest taxonomic grounp of animals having a cranium , vertabral column , ventral heart , pulmonary respiration and two

Last Answer : which of the following is the smallest taxonomic grounp of animals having a cranium , vertabral ... B. Gnathostomata C. Vertebrata D. Tetrapoda

Estalishment of polarity (anterior/posterior,dersal/ventral, medial/lateral) is called

Description : Estalishment of polarity (anterior/posterior,dersal/ventral, medial/lateral) is called

Last Answer : Estalishment of polarity (anterior/posterior,dersal/ventral, medial/lateral) is called A. Anamorphosis B ... C. Pattern formation D. Axis formation.

Assertion: Kidneys are retroperitoneal in position. Reason: Kidneys are covered with peritoneum only on ventral surface.

Description : Assertion: Kidneys are retroperitoneal in position. Reason: Kidneys are covered with peritoneum only on ventral surface.

Last Answer : Assertion: Kidneys are retroperitoneal in position. Reason: Kidneys are covered with peritoneum only on ... D. If both Assertion and Reason are false

What is Another anatomical term for a human that means the same as ventral?

Description : What is Another anatomical term for a human that means the same as ventral?

Last Answer : What is the answer ?

The wrist is located_____ of the elbow: a. proximal b. medial c. distal d. ventral?

Description : The wrist is located_____ of the elbow: a. proximal b. medial c. distal d. ventral?

Last Answer : proximal

A unique ultrastructural feature of Giardia is the adhesive disk also called as D A. Ventral disk B. Sucking disk C. Sucker D. All above

Description : A unique ultrastructural feature of Giardia is the adhesive disk also called as D A. Ventral disk B. Sucking disk C. Sucker D. All above

Last Answer : All above

Out of ‘X ’ pairs of ribs in humans only ‘Y ’ pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation. (a) X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends (b) X = 24, Y = 2 The true ribs are dorsally attached to vertebral column but are free on ventral side(c) X = 24, Y = 12True ribs are dorsally attached to vertebral column but are free on ventral side (d) X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum

Description : Out of X ' pairs of ribs in humans only Y ' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation. (a) X = 12, Y = 5 True ribs are ... (d) X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum

Last Answer : (d) X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum

.Which of the following is common among mammals? (a) They undergo no moulting. (b) They have seven cervical vertebrae.(c) They are carnivores. (d) They have ventral nerve cord.

Description : .Which of the following is common among mammals? (a) They undergo no moulting. (b) They have seven cervical vertebrae. (c) They are carnivores. (d) They have ventral nerve cord.

Last Answer : (a) They undergo no moulting.

Which one of the following animals is correctly matched with its one characteristic and the taxon? Animal Characteristic Taxon (a) Millipede Ventral nerve Arachnida cord (b) Sea anemone Triploblastic Cnidaria (c) Silver fish Pectoral and Chordata pelvic fins (d) Duckbilled Oviparous Mammalia platypus

Description : Which one of the following animals is correctly matched with its one characteristic and the taxon? Animal Characteristic Taxon (a) Millipede Ventral nerve Arachnida cord (b) Sea anemone ... Cnidaria (c) Silver fish Pectoral and Chordata pelvic fins (d) Duckbilled Oviparous Mammalia platypus

Last Answer : (d) Duckbilled Oviparous Mammalia platypus

Which one of the following animals is correctly matched with its one characteristic and the taxon? Animal Characteristic Taxon (a) Millipede Ventral nerve Arachnida cord (b) Sea anemone Triploblastic Cnidaria (c) Silver fish Pectoral and Chordata pelvic fins (d) Duckbilled Oviparous Mammalia platypus

Description : Which one of the following animals is correctly matched with its one characteristic and the taxon? Animal Characteristic Taxon (a) Millipede Ventral nerve Arachnida cord (b) Sea anemone ... Cnidaria (c) Silver fish Pectoral and Chordata pelvic fins (d) Duckbilled Oviparous Mammalia platypus

Last Answer : (d) Duckbilled Oviparous Mammalia platypus

Which of the following represents the correct combination without any exception ? Characteristics Class (a) Sucking and circular mouth; jaws absent, integument without scales; paired appendages. Cyclostomata (b) Body covered with feathers; skin moist and glandular, fore- limbs form wings; (c) Mammary gland; hair on body; pinnae; two pairs of limbs. Mammalia (d) Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord. Chondrichthyeslungs with air sacs. Aves

Description : Which of the following represents the correct combination without any exception ? Characteristics Class (a) Sucking and circular mouth; jaws absent, integument without scales; paired ... Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord. Chondrichthyes

Last Answer : (c) Mammary gland; hair on body; pinnae; two pairs of limbs. Mammalia

In male sharks, Claspers are found attached to (1) Anal fin (2) Pectoral fin (3) Pelvic fin (4) Ventral fin

Description : In male sharks, Claspers are found attached to (1) Anal fin (2) Pectoral fin (3) Pelvic fin (4) Ventral fin

Last Answer : Pelvic fin

Comparison between Chordates and Non-chordates -Biology

Description : Comparison between Chordates and Non-chordates -Biology

Last Answer : answer:

Comparison between Chordates and Non-chordates -Biology

Description : Comparison between Chordates and Non-chordates -Biology

Last Answer : answer: