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

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

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.

$ The skeleton which occurs on the surface of animal body is called exoskeleton. ! Endoskeleton is formed of bones.

Description : $ The skeleton which occurs on the surface of animal body is called exoskeleton. ! Endoskeleton is formed of bones.

Last Answer : $ The skeleton which occurs on the surface of animal body is called exoskeleton. ! Endoskeleton is formed of ... wrong D. If both As and R are wrong.

`{:("Convergent evolution","Divergent evolution"),((1)"Bones of forelimbs of vertebrates","Wings of butterfly and birds"),((2)"Thorns of Bougainvillia

Description : `{:("Convergent evolution","Divergent evolution"),((1)"Bones of forelimbs of vertebrates","Wings of butterfly and birds"),((2)"Thorns of Bougainvillia

Last Answer : `{:("Convergent evolution","Divergent evolution"),((1)"Bones of forelimbs of vertebrates","Wings ... Cucurbita","Wings of butterflies and birds"):}`

In which class of vertebrates pneumatic bones are found? Mention any one of its advantage.

Description : In which class of vertebrates pneumatic bones are found? Mention any one of its advantage.

Last Answer : Pneumatic bones are found in class aves. It makes the body very light and fly without friction

Which one of the following options gives one correct example each of convergent evolution and divergent evolution? Convergent Divergent evolution evolution (a) Eyes of octopus Bones of forelimbs and mammals of vertebrates (b) Thorns of Bougainvillea Wings of butterflies and tendrils of and bird Cucurbita (c) Bones of forelimbs Wings of butterfly of vertebrates and birds (d) Thorns of Bougainvillea Eyes of octopus and tendrils of and mammals Cucurbita

Description : Which one of the following options gives one correct example each of convergent evolution and divergent evolution? Convergent Divergent evolution evolution (a) Eyes of octopus Bones of forelimbs and ... birds (d) Thorns of Bougainvillea Eyes of octopus and tendrils of and mammals Cucurbita

Last Answer : (a) Eyes of octopus Bones of forelimbs and mammals of vertebrates

The long bones are hollow and connected by air passages. They are the characteristics of (a) reptilia (b) land vertebrates (c) aves (d) mammals.

Description : The long bones are hollow and connected by air passages. They are the characteristics of (a) reptilia (b) land vertebrates (c) aves (d) mammals.

Last Answer : (c) aves

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 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.

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)

what two groups of present-day vertebrates are the descendants of reptiles?

Description : what two groups of present-day vertebrates are the descendants of reptiles?

Last Answer : are alligator and snakes

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 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.

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 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

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

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.

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 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 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 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

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

$ The enzymes which joins short pieces DNA in the laggins strand is called ligase. ! Lagging strand and leading strand are formed due to replication f

Description : $ The enzymes which joins short pieces DNA in the laggins strand is called ligase. ! Lagging strand and leading strand are formed due to replication f

Last Answer : $ The enzymes which joins short pieces DNA in the laggins strand is called ligase. ! Lagging strand and ... wrong D. If both As and R are wrong.

$ Cerebrum is formed of four cerebral hemisphers. ! Pituitary gland is not a type of endocrine gland.

Description : $ Cerebrum is formed of four cerebral hemisphers. ! Pituitary gland is not a type of endocrine gland.

Last Answer : $ Cerebrum is formed of four cerebral hemisphers. ! Pituitary gland is not a type of endocrine gland. A. ... is wrong D. If both As and R are wrong.

$ Seive tubes in plants are formed of enucleated cells called seive members. ! All the activities of a seive cell are controlled by nucleated parenchy

Description : $ Seive tubes in plants are formed of enucleated cells called seive members. ! All the activities of a seive cell are controlled by nucleated parenchy

Last Answer : $ Seive tubes in plants are formed of enucleated cells called seive members. ! All the activities of a seive ... wrong D. If both As and R are wrong.

$ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body.

Description : $ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body.

Last Answer : $ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body. A. If both As ... is wrong D. If both As and R are wrong.

$ Karyokinesis is followed by cytokinesis. ! Two daughter nuclei are formed after telophase.

Description : $ Karyokinesis is followed by cytokinesis. ! Two daughter nuclei are formed after telophase.

Last Answer : $ Karyokinesis is followed by cytokinesis. ! Two daughter nuclei are formed after telophase. A. If both As ... wrong D. If both As and R are wrong.

$ Vacuoles help in compartmentisation inside a cell. ! A eukaryotic flagellum is formed of a protein called flagellin.

Description : $ Vacuoles help in compartmentisation inside a cell. ! A eukaryotic flagellum is formed of a protein called flagellin.

Last Answer : $ Vacuoles help in compartmentisation inside a cell. ! A eukaryotic flagellum is formed of a protein called ... wrong D. If both As and R are wrong.

$ Cell wall of plants is formed of fungal cellulose. ! Smooth endoplasmic reticulum has ribosomes on its flagellin.

Description : $ Cell wall of plants is formed of fungal cellulose. ! Smooth endoplasmic reticulum has ribosomes on its flagellin.

Last Answer : $ Cell wall of plants is formed of fungal cellulose. ! Smooth endoplasmic reticulum has ribosomes on its ... wrong D. If both As and R are wrong.

$ Agar-agar is a carbohydrate obtained from some sea weeds. ! Agar agar is a polysaccharides formed of many galactose monomers.

Description : $ Agar-agar is a carbohydrate obtained from some sea weeds. ! Agar agar is a polysaccharides formed of many galactose monomers.

Last Answer : $ Agar-agar is a carbohydrate obtained from some sea weeds. ! Agar agar is a polysaccharides formed of many ... wrong D. If both As and R are wrong.

$ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

Description : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

Last Answer : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and ... wrong D. If both As and R are wrong.

$ All the living and non living matter is formed of molecules. ! Molecules are of two types (i) Micro-molecules (ii) Macro-molecules.

Description : $ All the living and non living matter is formed of molecules. ! Molecules are of two types (i) Micro-molecules (ii) Macro-molecules.

Last Answer : $ All the living and non living matter is formed of molecules. ! Molecules are of two types (i) Micro- ... is wrong D. If both As and R are wrong.

$ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a protein called Tubulin.

Description : $ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a protein called Tubulin.

Last Answer : $ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a ... wrong D. If both As and R are wrong.