Gills slits in chondricthyes are

Gills slits in chondricthyes are
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Answer :

Gills slits in chondricthyes are A. Uncovered B. Coverd by operculum C. Absent D. Only sometimes covered
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Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their adaptation to aquatic life secondary.

Description : Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their adaptation to aquatic life secondary.

Last Answer : Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their ... . D. If both Assertion & Reason are false.

What happens to light waves when they pass through slits in a barrier The wave model of light?

Description : What happens to light waves when they pass through slits in a barrier The wave model of light?

Last Answer : Need answer

What is being modeled at slits a and b as you pull the strips down through the base seafloor spreading?

Description : What is being modeled at slits a and b as you pull the strips down through the base seafloor spreading?

Last Answer : What is the answer ?

Given below are four matchings of an animal and its kind of respiratory organ: (A) Silver fish – Trachea (B) Scorpion – Book lung (C) Sea squirt – Pharyngeal slits (D) Dolphin – Skin The correct matchings are (a) (A) and (B) (b) (A), (B) and (C) (c) (B) and (D) (d) (C) and (D).

Description : Given below are four matchings of an animal and its kind of respiratory organ: (A) Silver fish – Trachea (B) Scorpion – Book lung (C) Sea squirt – Pharyngeal slits (D) Dolphin – Skin The correct matchings are (a) (A) and (B) (b) (A), (B) and (C) (c) (B) and (D) (d) (C) and (D).

Last Answer : (b) (A), (B) and (C)

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

Crocodile and penguin are similar to whale and dogfish in which one of the following features? (a) Possess a solid single stranded central nervous system (b) Lay eggs and guard them till they hatch (c) Possess bony skeleton (d) Have gill slits at some stage

Description : Crocodile and penguin are similar to whale and dogfish in which one of the following features? (a) Possess a solid single stranded central nervous system (b) Lay eggs and guard them till they hatch (c) Possess bony skeleton (d) Have gill slits at some stage

Last Answer : (d) Have gill slits at some stage

Sharks and dogfishes differ from skates and rays because (a) gill slits are ventrally placed (b) head and trunk are widened considerably (c) distinct demarcation between body and tail (d) their pectoral fins distinctly marked off from cylindrical bodies

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Last Answer : (d) their pectoral fins distinctly marked off from cylindrical bodies

Sharks and dogfishes differ from skates and rays because (a) gill slits are ventrally placed (b) head and trunk are widened considerably (c) distinct demarcation between body and tail (d) their pectoral fins distinctly marked off from cylindrical bodies.

Description : Sharks and dogfishes differ from skates and rays because (a) gill slits are ventrally placed (b) head and trunk are widened considerably (c) distinct demarcation between body and tail (d) their pectoral fins distinctly marked off from cylindrical bodies.

Last Answer : (d) their pectoral fins distinctly marked off from cylindrical bodies.

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

Match the following columns and select the correct option. Column-I Column-II (A) 6-15 pairs of gill slits (i) Trygon (B) Heterocercal caudal fin (ii) Cyclostomes (C) Air bladder (iii) Chondrichthyes (D) Poison sting (iv) Osteichthyes(A) (B) (C) (D) (a) (ii) (iii) (iv) (i) (b) (iii) (iv) (i) (ii) (c) (iv) (ii) (iii) (i) (d) (i) (iv) (iii) (ii)

Description : Match the following columns and select the correct option. Column-I Column-II (A) 6-15 pairs of gill slits (i) Trygon (B) Heterocercal caudal fin (ii) Cyclostomes (C) Air bladder (iii) Chondrichthyes (D) Poison sting (iv) Osteichthyes ... (i) (ii) (c) (iv) (ii) (iii) (i) (d) (i) (iv) (iii) (ii)

Last Answer : (a) (ii) (iii) (iv) (i)

What is the effect of increasing the number of slits on the intensity of Central maxima of diffraction pattern of a diffraction grating? A. Intensity of central maxima will decrease B. Intensity of central maxima will increase C. There will not be any effect D. Diffraction pattern will disappear

Description : What is the effect of increasing the number of slits on the intensity of Central maxima of diffraction pattern of a diffraction grating? A. Intensity of central maxima will decrease B. Intensity ... maxima will increase C. There will not be any effect D. Diffraction pattern will disappear

Last Answer : B. Intensity of central maxima will increase

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Last Answer : C. It is the distance between two slits

.If we narrow the distance between two slits in Young’s experiment the fringes width __________. A. Increases B. Decreases C. Remains same D. becomes zero

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Last Answer : B. Decreases

Coherent light of a single frequency passes through a double slit with a separation d, to produce a pattern on a screen as distance D from the slits. What would cause the separation between adjacent minima on the screen to increase? A. A. increase the index of refraction of the medium in which the setup is immersed B. increase the separation d between the slits C. increase the distance D. increase the frequency of the incident light

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In a Young's double-slit experiment the center of a bright fringe occurs wherever waves from the slits differ in the distance they travel by a multiple of: A. a fourth of a wavelength B. a half a wavelength C. a wavelength D. three-fourths of a wavelength

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

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Last Answer : c) Embryological evidence

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

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Last Answer : (2) Pharynx with gill slits

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Last Answer : I would love to do that. Where do I sign up?

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What are gills? -Biology

Description : What are gills? -Biology

Last Answer : answer:

None Animals The gills Or Lungs With Respiration Done By ?

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How many animals in the given list have gills for respiration ? Earthworm , Frog, Fish, Insects, Reptiles, Aquatic arthropods, Flatworm, Molluscs, Bir

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Last Answer : How many animals in the given list have gills for respiration ? Earthworm , Frog, Fish, Insects, Reptiles, ... A. Six B. Four C. Three D. Five

Presence of gills in the tadpole of frog indicates that

Description : Presence of gills in the tadpole of frog indicates that

Last Answer : Presence of gills in the tadpole of frog indicates that A. Fishes evolved from frog like ... ancsetors D. Fishes were amphibious in the past

How many gills do blue tang have?

Description : How many gills do blue tang have?

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How does a sea animal like dolphin survive in water without gills please give answer same Long?

Description : How does a sea animal like dolphin survive in water without gills please give answer same Long?

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Why dolphins and whales do not have gills?

Description : Why dolphins and whales do not have gills?

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What is the function of the gills in a starfish?

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Fish respire through their (a) nose (b) lungs (c) gills (d) fins

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What is the difference between gills and lungs?

Description : What is the difference between gills and lungs?

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The newly hatched tadpo e breaths through its – (1) Lung (2) External gills (3) Internal gills (4) All of the above

Description : The newly hatched tadpo e breaths through its – (1) Lung (2) External gills (3) Internal gills (4) All of the above

Last Answer : (2) External gills Explanation: A tadpole resembles a fish and breathes through external gills. Adult frogs breathe through their lungs and exchange gases through their skin and the lining of their mouths.

How do most insects respire? (1) Through skin (2) Through gills (3) By tracheal system (4) By lungs

Description : How do most insects respire? (1) Through skin (2) Through gills (3) By tracheal system (4) By lungs

Last Answer : (3) By tracheal system Explanation: Insects do not have lungs to do respiration. In insects respiration takes place through tracheae. Tracheae are tube like structures that open on the sides of their body through tiny holes called spiracles.

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

Through which organ does a fish respire? A. Nose B. Lungs C. Gills (Answer) D. Fins

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Last Answer : C. Gills (Answer)

Which one of the following are analogous structures? (a) Wings of bat and wings of pigeon (b) Gills of prawn and lungs of man (c) Thorns of Bougainvillea and tendrils of Cucurbita (d) Flippers of dolphin and legs of horse

Description : Which one of the following are analogous structures? (a) Wings of bat and wings of pigeon (b) Gills of prawn and lungs of man (c) Thorns of Bougainvillea and tendrils of Cucurbita (d) Flippers of dolphin and legs of horse

Last Answer : (a) Wings of bat and wings of pigeon

Which one of the following statements is incorrect? (a) The principle of countercurrent flow facilitates efficient respiration in gills of fishes. (b) The residual air in lungs slightly decreases the efficiency of respiration in mammals. (c) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds. (d) In insects, circulating body fluids serve to distribute oxygen to tissues.

Description : Which one of the following statements is incorrect? (a) The principle of countercurrent flow facilitates efficient respiration in gills of fishes. (b) The residual air in lungs slightly decreases the ... in birds. (d) In insects, circulating body fluids serve to distribute oxygen to tissues.

Last Answer : (b) The residual air in lungs slightly decreases the efficiency of respiration in mammals.

A chordate character is (a) gills (b) spiracles (c) post-anal tail (d) chitinous exoskeleton

Description : A chordate character is (a) gills (b) spiracles (c) post-anal tail (d) chitinous exoskeleton

Last Answer : (c) post-anal tail

The nephridia in earthworm are analogous to (a) nematoblasts of Hydra (b) flame cells of Planaria (c) gills of prawn (d) trachea of insects.

Description : The nephridia in earthworm are analogous to (a) nematoblasts of Hydra (b) flame cells of Planaria (c) gills of prawn (d) trachea of insects.

Last Answer : (b) flame cells of Planaria

Presence of gills in the tadpole of frog indicates that (a) fish were amphibious in the past (b) fish evolved from frog-like ancestors (c) frogs will have gills in future (d) frogs evolved from gilled ancestors.

Description : Presence of gills in the tadpole of frog indicates that (a) fish were amphibious in the past (b) fish evolved from frog-like ancestors (c) frogs will have gills in future (d) frogs evolved from gilled ancestors.

Last Answer : (d) frogs evolved from gilled ancestors.

Which one of the following categories of animals, is correctly described with no single exception in it? (a) All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal). (b) All bony fishes have four pairs of gills and an operculum on each side. (c) All sponges are marine and have collared cells. (d) All mammals are viviparous and possess diaphragm for breathing.

Description : Which one of the following categories of animals, is correctly described with no single exception in it? (a) All reptiles possess scales, have a three chambered heart and are cold blooded ( ... marine and have collared cells. (d) All mammals are viviparous and possess diaphragm for breathing.

Last Answer : (b) All bony fishes have four pairs of gills and an operculum on each side

Which one of the following categories of animals, is correctly described with no single exception in it? (a) All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal). (b) All bony fishes have four pairs of gills and an operculum on each side. (c) All sponges are marine and have collared cells. (d) All mammals are viviparous and possess diaphragm for breathing.

Description : Which one of the following categories of animals, is correctly described with no single exception in it? (a) All reptiles possess scales, have a three chambered heart and are cold blooded ( ... marine and have collared cells. (d) All mammals are viviparous and possess diaphragm for breathing.

Last Answer : (b) All bony fishes have four pairs of gills and an operculum on each side.

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

Choose the correct statement. (a) All mammals are viviparous. (b) All cyclostomes do not possess jaws and paired fins. (c) All reptiles have a three-chambered heart. (d) All pisces have gills covered by an operculum

Description : Choose the correct statement. (a) All mammals are viviparous. (b) All cyclostomes do not possess jaws and paired fins. (c) All reptiles have a three-chambered heart. (d) All pisces have gills covered by an operculum

Last Answer : (b) All cyclostomes do not possess jaws and paired fins.

Which is false regarding freshwater fish? a) their blood is hypertonic to their environment b) they often actively take up salt c) they excrete urine hypotonic to the blood d) their gills actively excrete salts

Description : Which is false regarding freshwater fish? a) their blood is hypertonic to their environment b) they often actively take up salt c) they excrete urine hypotonic to the blood d) their gills actively excrete salts

Last Answer : ANSWER: D -- THEIR GILLS ACTIVELY EXCRETE SALTS

Oxygen enters the body of a grasshopper through: a) gills b) spinnerets c) spiracles d) book lungs

Description : Oxygen enters the body of a grasshopper through: a) gills b) spinnerets c) spiracles d) book lungs

Last Answer : ANSWER: C -- SPIRACLES 

The newly hatched tadpole breaths through its (1) Lung (2) External gills (3) Internal gills (4) All of the above

Description : The newly hatched tadpole breaths through its (1) Lung (2) External gills (3) Internal gills (4) All of the above

Last Answer : External gills

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