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

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

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.

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)

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.

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

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

(i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Description : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.

Study the given figure below and answer the question that follow important-questions-for-class-12-biology-cbse-fertilisation-pregnancy-and-embryonic-development-t-33-3 (i)Name the stage of human embryo the figure represents. (ii)Identify Ain the figure and mention its function. (iii)Mention the fate of the inner cell mass after implantation in the uterus. (iv)Where are the stem cells located in this embryo? -Biology

Description : Study the given figure below and answer the question that follow important-questions-for-class-12-biology-cbse-fertilisation-pregnancy-and-embryonic-development-t-33-3 (i)Name the stage of human embryo the ... implantation in the uterus. (iv)Where are the stem cells located in this embryo? -Biology

Last Answer : (i)The stage is blastocyst. (ii) A—Trophoblast. It helps in attachment to endometrium during implantation and provides nourishment to developing embryo. (iii) Inner cell mass acts as precursor to embryo ... into ectoderm and endoderm. (iv) Stem cells are located in inner cell mass of embryo.

Name the embryonic stage that gets implanted in the uterine wall of a human female. -Biology

Description : Name the embryonic stage that gets implanted in the uterine wall of a human female. -Biology

Last Answer : Blastocyst gets implanted in the uterine wall.

In which stage of development the embryonic cells form the germinal layers by the movement

Description : In which stage of development the embryonic cells form the germinal layers by the movement

Last Answer : In which stage of development the embryonic cells form the germinal layers by the movement A. Morula B. Blastula C. Gastrula D. Zygote

Movement of blastomers usually seen in which embryonic stage :-

Description : Movement of blastomers usually seen in which embryonic stage :-

Last Answer : Movement of blastomers usually seen in which embryonic stage :- A. Morula B. Blastula C. Gastrula D. In all embryonic stages

Three germ layers are formed during which stage of embryonic development :-

Description : Three germ layers are formed during which stage of embryonic development :-

Last Answer : Three germ layers are formed during which stage of embryonic development :- A. Morula B. Blastula C. Gastrula D. In any two stages

Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is mainly found in enbryonic stage .

Description : Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is mainly found in enbryonic stage .

Last Answer : Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is ... D. If both Assertion & Reason are false.

What is the cell division during the first stage of the embryonic development called ?

Description : What is the cell division during the first stage of the embryonic development called ?

Last Answer : How is this stage characterized? The cell division in the first stage of the embryonic developments is called cleavage, or segmentation. In this stage, mitosis occurs from the zygote forming the new embryo.

What are the cells produced in the first stage of the embryonic development called ?

Description : What are the cells produced in the first stage of the embryonic development called ?

Last Answer : The cells that resulted from the cleavage (the first stage of the embryonic development) are called blastomeres. In this stage the embryo is called morula (similar to a “morus”, mulberry).

After the blastula stage what is the following stage of the embryonic development ?

Description : After the blastula stage what is the following stage of the embryonic development ?

Last Answer : How is the passage from blastula to the next stage called? The blastula turns into gastrula in a process known as gastrulation.

After the blastula stage what is the following stage of the embryonic development ?

Description : After the blastula stage what is the following stage of the embryonic development ?

Last Answer : How is the passage from blastula to the next stage called? The blastula turns into gastrula in a process known as gastrulation. Image Diversity: gastrula

What are the cells produced in the first stage of the embryonic development called ?

Description : What are the cells produced in the first stage of the embryonic development called ?

Last Answer : The cells that resulted from the cleavage (the first stage of the embryonic development) are called blastomeres. In this stage the embryo is called morula (similar to a “morus”, mulberry). Image Diversity: morula

What is the cell division during the first stage of the embryonic development called ?

Description : What is the cell division during the first stage of the embryonic development called ?

Last Answer : How is this stage characterized? The cell division in the first stage of the embryonic developments is called cleavage, or segmentation. In this stage, mitosis occurs from the zygote forming the new embryo.

How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development?

Description : How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development?

Last Answer : In crustaceans there are species with direct and others with indirect development. In insects there are species without larval stage (ametabolic insects), others undergoing indirect ... while holometabolic insects undergo complete metamorphosis. Phylum Arthropoda - Image Diversity: metamorphosis

pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Description : pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Last Answer : c) Embryological evidence

$ 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.

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.

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.

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).

What is the chorioallantois membrane present in the embryonic development of reptiles and birds ?

Description : What is the chorioallantois membrane present in the embryonic development of reptiles and birds ?

Last Answer : How does this membrane participate in the energetic metabolism of the embryo? The chorioallantois membrane is formed by juxtaposition of some regions of the chorion and the allantois. Since it is ... of gases between the embryo and the exterior thus making aerobic cellular respiration possible.

What are the extra embryonic membranes present in vertebrates ?

Description : What are the extra embryonic membranes present in vertebrates ?

Last Answer : The extra embryonic membranes that may be present in vertebrates are the yolk sac, the amnion, the chorion, the allantois and the placenta.

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).

Which of the following features is not present in Periplaneta americana? (a) Exoskeleton composed of N-acetylglucosamine (b) Metamerically segmented body (c) Schizocoelom as body cavity (d) Indeterminate and radial cleavage during embryonic development

Description : Which of the following features is not present in Periplaneta americana? (a) Exoskeleton composed of N-acetylglucosamine (b) Metamerically segmented body (c) Schizocoelom as body cavity (d) Indeterminate and radial cleavage during embryonic development

Last Answer : (a) Exoskeleton composed of N-acetylglucosamine

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

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.

Does a kangaroo have a dorsal nerve cord notochord?

Description : Does a kangaroo have a dorsal nerve cord notochord?

Last Answer : dorsal nerve cord

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 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.

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

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 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

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

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