Does a kangaroo have a dorsal nerve cord notochord?

Does a kangaroo have a dorsal nerve cord notochord?
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dorsal nerve cord
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Which of the following animals is devoid of notochord and nerve cord in its adult stage ?

Description : Which of the following animals is devoid of notochord and nerve cord in its adult stage ?

Last Answer : Which of the following animals is devoid of notochord and nerve cord in its adult stage ? A. ... amphioxus ) C. Assymetron D. All of the above

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

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 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

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)

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?

The following are true about the spinal cord: a. segment T12 lies at the level of vertebral body T9 b. cerebrospinal fluid is found within the subdural space c. two point discrimination is transmitted in the dorsal column d. hemisection results in contralateral loss of pain and temperature sense below the lesio

Description : The following are true about the spinal cord: a. segment T12 lies at the level of vertebral body T9 b. cerebrospinal fluid is found within the subdural space c. two point ... the dorsal column d. hemisection results in contralateral loss of pain and temperature sense below the lesio

Last Answer : segment T12 lies at the level of vertebral body T9

The following are true about pain: a. in disseminated cancer can be effectively relieved by hypophysectomy b. does not ascend through the dorsal column of the spinal cord c. is transmitted faster through the C fibres than the A delta fibres d. stimulation of the ß receptors in the brain produces analgesia

Description : The following are true about pain: a. in disseminated cancer can be effectively relieved by hypophysectomy b. does not ascend through the dorsal column of the spinal cord c. is transmitted faster ... fibres than the A delta fibres d. stimulation of the ß receptors in the brain produces analgesia

Last Answer : stimulation of the ß receptors in the brain produces analgesia

The following sensations are conveyed in the dorsal column of the spinal cord: a. pain b. temperature c. vibration d. proprioception

Description : The following sensations are conveyed in the dorsal column of the spinal cord: a. pain b. temperature c. vibration d. proprioception

Last Answer : vibration

Of the following neurotransmitters, which demonstrates inhibitory action, helps control mood and sleep, and inhibits pain pathways? a) Serotonin The sources of serotonin are the brain stem, hypothalamus, and dorsal horn of the spinal cord.

Description : Of the following neurotransmitters, which demonstrates inhibitory action, helps control mood and sleep, and inhibits pain pathways? a) Serotonin The sources of serotonin are the brain ... d) Acetylcholine Acetylcholine is usually excitatory, but the parasympathetic effects are sometimes inhibitory.

Last Answer : a) Serotonin The sources of serotonin are the brain stem, hypothalamus, and dorsal horn of the spinal cord.

If the dorsal root of the spinal nerve were cut?

Description : If the dorsal root of the spinal nerve were cut?

Last Answer : What is the answer ?

Adrenaline directly affects on (a) SA node (b) β-cells of Langerhans (c) dorsal root of spinal nerve (d) epithelial cells of stomach.

Description : Adrenaline directly affects on (a) SA node (b) β-cells of Langerhans (c) dorsal root of spinal nerve (d) epithelial cells of stomach.

Last Answer : (a) SA node

why accessory nerve is not spinal nerve even it emerges from spinal cord? -Biology

Description : why accessory nerve is not spinal nerve even it emerges from spinal cord? -Biology

Last Answer : answer:

The nerve cord of cockroach is :

Description : The nerve cord of cockroach is :

Last Answer : The nerve cord of cockroach is : A. Double, ventral and solid B. Double dorsal and hollow C. Single, dorsal and solid D. Single, ventral and hollow

.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 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

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

Does Vertibrata become embryonic notochord ?

Description : Does Vertibrata become embryonic notochord ?

Last Answer : Answer : In the vertebrate phase, the embryonic notochord turns into a nerve.

in which of the following the notochord is present in embryonic stage

Description : in which of the following the notochord is present in embryonic stage

Last Answer : in which of the following the notochord is present in embryonic stage A. All chordates B. Some chordates C. Vertebrates D. Non- chordates

in urochordata notochord is found in

Description : in urochordata notochord is found in

Last Answer : in urochordata notochord is found in A. Head of adult B. Tail of adult C. Tail of larva D. Test of adult

Notochord occurs in the adult animal of

Description : Notochord occurs in the adult animal of

Last Answer : Notochord occurs in the adult animal of A. Protochordates B. Agnatha C. Chondrichthyes D. Osteichthyes

Notochord, skeletal system and dermis of skin are derived from

Description : Notochord, skeletal system and dermis of skin are derived from

Last Answer : Notochord, skeletal system and dermis of skin are derived from A. Mesoderm B. Endoderm C. Ectodermq D. All the above.

Notochord develops from

Description : Notochord develops from

Last Answer : Notochord develops from A. Primary ectoderm B. Primary endoderm C. primary mesoderm D. Both A and B

Notochord grows from

Description : Notochord grows from

Last Answer : Notochord grows from A. Neuropore B. Prechordal plate C. Hypochordal rod D. Chorda-mesoderm.

Formation of notochord is

Description : Formation of notochord is

Last Answer : Formation of notochord is A. Neurulation B. Notogenesis C. Morulation D. Blastulation

$ Notochord is present in vertebrates. ! Notochord is always formed of bones.

Description : $ Notochord is present in vertebrates. ! Notochord is always formed of bones.

Last Answer : $ Notochord is present in vertebrates. ! Notochord is always formed of bones. A. If both A and R are ... is wrong D. If both A and R are wrong.

In which group, notochord is present only in the tail of larva.

Description : In which group, notochord is present only in the tail of larva.

Last Answer : In which group, notochord is present only in the tail of larva.

In some chordates, the notochord is replaced by cartilaginous or bony vertebral column. Name the chordates which possess this character.

Description : In some chordates, the notochord is replaced by cartilaginous or bony vertebral column. Name the chordates which possess this character.

Last Answer : In some chordates, the notochord is replaced by cartilaginous or bony vertebral column. Name the chordates which possess this character.

What is notochord ?

Description : What is notochord ?

Last Answer : How is this structure formed? Notochord is a rodlike structure that forms the supporting axis of the embryo and gives birth to the vertebral column in vertebrates. It is formed by differentiation of mesodermal cells.

What is notochord ?

Description : What is notochord ?

Last Answer : How is this structure formed? Notochord is a rodlike structure that forms the supporting axis of the embryo and gives birth to the vertebral column in vertebrates. It is formed by differentiation of mesodermal cells.

What is the destination of the notochord in vertebrates and in protochordates?

Description : What is the destination of the notochord in vertebrates and in protochordates?

Last Answer : In vertebrates the notochord disappears and gives birth to the spinal column (vertebral column). In protochordates the notochord remains for the rest of the life.

An invertebrate does not have – (1) Notochord (2) Body cavity (3) Haernocoel (4) Gills

Description : An invertebrate does not have – (1) Notochord (2) Body cavity (3) Haernocoel (4) Gills

Last Answer : (1) Notochord Explanation: An invertebrate does not have back bone and cell wall

The subphylum in which notochord is restricted only to the embryonic stage is

Description : The subphylum in which notochord is restricted only to the embryonic stage is

Last Answer : vertebrata.

The subphylum in which notochord is present through the length of the body is

Description : The subphylum in which notochord is present through the length of the body is

Last Answer : Cephalochordata.

The subphylum in which notochord is present only in the tail region of the larvae and absent in adults is

Description : The subphylum in which notochord is present only in the tail region of the larvae and absent in adults is

Last Answer : Urochordata.

The subphylum in which notochord is restricted to the anterior half of the body is

Description : The subphylum in which notochord is restricted to the anterior half of the body is

Last Answer : Hemichordata.

Organisms characterized by the presence of a notochord are called

Description : Organisms characterized by the presence of a notochord are called

Last Answer : chordates.

In which of the following, notochord is present in embryonic stage? (a) All chordates (b) Some chordates (c) Vertebrates (d) Non chordates

Description : In which of the following, notochord is present in embryonic stage? (a) All chordates (b) Some chordates (c) Vertebrates (d) Non chordates

Last Answer : (a) All chordates

Which one of the following phyla is correctly matched with its two general characteristics? (a) Echinodermata - pentamerous radial symmetry and mostly internal fertilization (b) Mollusca - normally oviparous and development through a trochophore or veliger larva (c) Arthropoda - body divided into head, thorax and abdomen and respiration by tracheae (d) Chordata - notochord at some stage and separate anal and urinary openings to the outside.

Description : Which one of the following phyla is correctly matched with its two general characteristics? (a) Echinodermata - pentamerous radial symmetry and mostly internal fertilization (b) Mollusca - normally ... Chordata - notochord at some stage and separate anal and urinary openings to the outside.

Last Answer : (c) Arthropoda - body divided into head, thorax and abdomen and respiration by tracheae

Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct? (a) It is present only in larval tail in ascidian. (b) It is replaced by a vertebral column in adult frog. (c) It is absent throughout life in humans from the very beginning. (d) It is present throughout life in Amphioxus.

Description : Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct? (a) It is present only in larval tail in ascidian. (b) It is ... absent throughout life in humans from the very beginning. (d) It is present throughout life in Amphioxus.

Last Answer : (c) It is absent throughout life in humans from the very beginning.

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

An important criterion for modern day classification is (a) resemblances in morphology (b) anatomical and physiological traits (c) breeding habits (d) presence or absence of notochord.

Description : An important criterion for modern day classification is (a) resemblances in morphology (b) anatomical and physiological traits (c) breeding habits (d) presence or absence of notochord.

Last Answer : (b) anatomical and physiological traits

Notochord is found in the tail regionof a) Chordata b) Urochordata c) Cephalochordata d) Vertebrata

Description : Notochord is found in the tail regionof a) Chordata b) Urochordata c) Cephalochordata d) Vertebrata

Last Answer : b) Urochordata

An invertebrate does not have (1) Notochord (2) Body cavity (3) Haemocoel (4) Gills

Description : An invertebrate does not have (1) Notochord (2) Body cavity (3) Haemocoel (4) Gills

Last Answer : Notochord

A fold of dorsal body wall which covers the visceral mass in molluscs is called as

Description : A fold of dorsal body wall which covers the visceral mass in molluscs is called as

Last Answer : A fold of dorsal body wall which covers the visceral mass in molluscs is called as A. Operculum B. Mantle C. Shell D. None of these

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)

round swelling at the dorsal portion of the midbrain is known as

Description : round swelling at the dorsal portion of the midbrain is known as

Last Answer : round swelling at the dorsal portion of the midbrain is known as