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

Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their adaptation to aquatic life secondary.
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Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their ... . D. If both Assertion & Reason are false.
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Related questions

Which among these is the correct combination of aquatic mammals? (a) Dolphins, Seals, Trygon (b) Whales, Dolphins, Seals (c) Trygon, Whales, Seals (d) Seals, Dolphins, Sharks

Description : Which among these is the correct combination of aquatic mammals? (a) Dolphins, Seals, Trygon (b) Whales, Dolphins, Seals (c) Trygon, Whales, Seals (d) Seals, Dolphins, Sharks

Last Answer : (b) Whales, Dolphins, Seal

Which among these is the correct combination of aquatic mammals ? (1) Dolphins, Seals, Trygon (2) Whales, Dolphins, Seals (3) Trygon, Whales, Seals (4) Seals, Dolphins, Sharks

Description : Which among these is the correct combination of aquatic mammals ? (1) Dolphins, Seals, Trygon (2) Whales, Dolphins, Seals (3) Trygon, Whales, Seals (4) Seals, Dolphins, Sharks

Last Answer : (2) Whales, Dolphins, Seals

Assertion :- All mammals like whales, bats cheetah and human etc. share similarities in the pattern of bonse of forelimbs. Reason :- Eutherians show g

Description : Assertion :- All mammals like whales, bats cheetah and human etc. share similarities in the pattern of bonse of forelimbs. Reason :- Eutherians show g

Last Answer : Assertion :- All mammals like whales, bats cheetah and human etc. share similarities in the pattern of ... . D. If both Assertion & Reason are false.

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

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.

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

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)

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

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

Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the

Description : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the

Last Answer : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason ` ... . D. If both Assertion & Reason are false.

Sea turtles, dolphins, and whales all live in the ocean. How do the respiratory systems of these three types of animals limit their behavior?

Description : Sea turtles, dolphins, and whales all live in the ocean. How do the respiratory systems of these three types of animals limit their behavior?

Last Answer : They must swim to the surface to breathe because their lungs require air and not water.

Why dolphins and whales do not have gills?

Description : Why dolphins and whales do not have gills?

Last Answer : They are not fish. They are mammals and must come up to the surface to breath air using internal lungs (as all mammals do).

What is it called when bats, whales, and dolphins emit sound waves and interpret the reflect sound waves as a means to locate objects?

Description : What is it called when bats, whales, and dolphins emit sound waves and interpret the reflect sound waves as a means to locate objects?

Last Answer : Sonar is a system that locates objects by transmitting sound waves and detecting the waves when they are reflected off of objects. Bats and many other animals, such as whales and dolphins, use natural sonar to navigate and capture

Which of the following animals are dolphins not closely related to? (a) Whales (b) Porpoises (c) Dugong (d) All of the above

Description : Which of the following animals are dolphins not closely related to? (a) Whales (b) Porpoises (c) Dugong (d) All of the above

Last Answer : Ans:(b)

Assertion: Old age is not an illness. It is a normal It is a continuation of life with decreasing capacity for adaptation. Reason: Cessation of mitosi

Description : Assertion: Old age is not an illness. It is a normal It is a continuation of life with decreasing capacity for adaptation. Reason: Cessation of mitosi

Last Answer : Assertion: Old age is not an illness. It is a normal It is a continuation of life with decreasing ... D. If both the assertion and resson are false.

Which reproductive adaptation is characteristic of most terrestrial vertebrates but not of most aquatic vertebrates?

Description : Which reproductive adaptation is characteristic of most terrestrial vertebrates but not of most aquatic vertebrates?

Last Answer : Which reproductive adaptation is characteristic of most terrestrial vertebrates but not of most aquatic ... C. Motile gametes D. External development.

Which one of the following pairs is correctly matched? (a) Parasitism - intraspecific relationship (b) Uricotelism - aquatic habitat (c) Excessive perspiration - xeric adaptation (d) Streamlined body - aquatic adaptation

Description : Which one of the following pairs is correctly matched? (a) Parasitism - intraspecific relationship (b) Uricotelism - aquatic habitat (c) Excessive perspiration - xeric adaptation (d) Streamlined body - aquatic adaptation

Last Answer : d) Streamlined body - aquatic adaptation

Assertion `:-` Uricotelism is terrestrial adaptation. Reason `:-` Uric acid is least toxic and can be removed with a minimum loss of water.

Description : Assertion `:-` Uricotelism is terrestrial adaptation. Reason `:-` Uric acid is least toxic and can be removed with a minimum loss of water.

Last Answer : Assertion `:-` Uricotelism is terrestrial adaptation. Reason `:-` Uric acid is least toxic and can be ... . D. If both Assertion & Reason are false.

Being all mammals, whale, dolphins, bat, monkey and horse have some common character but they also show conspicuous differences. This is due to phenom

Description : Being all mammals, whale, dolphins, bat, monkey and horse have some common character but they also show conspicuous differences. This is due to phenom

Last Answer : Being all mammals, whale, dolphins, bat, monkey and horse have some common character but they also ... B. Genetic drift C. Divergence D. Convergence

Are dolphins and elephants mammals?

Description : Are dolphins and elephants mammals?

Last Answer : Yes. They are mammals.

Why are dolphins mammals?

Description : Why are dolphins mammals?

Last Answer : Because they have the characteristics of a mammal. Despite looking like a big fish they breathe with lungs, give live birth, and feed their young milk.

Assertion : Lateral line system is found in fishes and aquatic larval amphibians. Reason : Lateral line system has receptor of sensory cells derived f

Description : Assertion : Lateral line system is found in fishes and aquatic larval amphibians. Reason : Lateral line system has receptor of sensory cells derived f

Last Answer : Assertion : Lateral line system is found in fishes and aquatic larval amphibians. Reason : Lateral line ... D. If both Assertion and Reason are false.

Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and requires large amount of water for its eliminati

Description : Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and requires large amount of water for its eliminati

Last Answer : Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and ... . D. If both Assertion & Reason are false.

Why are whales mammals?

Description : Why are whales mammals?

Last Answer : Like all mammals, whales breathe air into lungs are warmblooded , feed their young with milk from mammary glands and have some hair although very littleBecause that's the way they evolved. They are classed as mammals because they breathe air and give live birth.

Compared to mammals do birds absorb more or less water in their digestive system? Why is this phenomenon an adaptation to flight?

Description : Compared to mammals do birds absorb more or less water in their digestive system? Why is this phenomenon an adaptation to flight?

Last Answer : Bird feces are more liquid than mammal feces, i.e., less water is absorbed in the avian digestive system. The more frequent elimination of feces in birds due to their less solid feces is an adaptation to flight since their body weight is kept lower.

Assertion : Lycaenops is a mammals - like reptile. Reason : Mammal - like reptiles originated in the Permian period.

Description : Assertion : Lycaenops is a mammals - like reptile. Reason : Mammal - like reptiles originated in the Permian period.

Last Answer : Assertion : Lycaenops is a mammals - like reptile. Reason : Mammal - like reptiles originated in the ... D. If both Assertion and Reason are false.

Adaptation for approach of sperm of egg in mammals -

Description : Adaptation for approach of sperm of egg in mammals -

Last Answer : Adaptation for approach of sperm of egg in mammals - A. Sperm kept inactive till ejaculation B. Very ... C. Peristalsis of oviduct D. All the above

Which among these is the CORRECT combination of aquatic mammals? 

Description : Which among these is the CORRECT combination of aquatic mammals? 

Last Answer : Which among these is the CORRECT combination of aquatic mammals? (a) Seals, Dolphins, Sharks (b) ... , Dolphins, Seals (d) Trygon, Whales, Seals

Are there aquatic and flying mammals?

Description : Are there aquatic and flying mammals?

Last Answer : Cetaceans (whales, dolphins) and sirenians (dugongs, manatees) are aquatic mammals. Chiropterans (bats) are flying mammals.

Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet are grouped under mammals. Reason : Both of them have

Description : Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet are grouped under mammals. Reason : Both of them have

Last Answer : Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet ... false D. If both Assertion and Reason are false.

Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of prothrombin to thrombin

Description : Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of prothrombin to thrombin

Last Answer : Assertion: Heparin is an anticoagulant found in mammals. Reason: Heparin prevents the conversion of ... . If both Assertion & Reason are false.

Assertion :- Due to continental drift pouched mammals of Australia survived. Reason :- There is lack of competition from any other mammal.

Description : Assertion :- Due to continental drift pouched mammals of Australia survived. Reason :- There is lack of competition from any other mammal.

Last Answer : Assertion :- Due to continental drift pouched mammals of Australia survived. Reason :- There is lack of ... D. If both Assertion & Reason are false.

Assertion : All Eutherian are placental mammals . Reason : All placental mammals have menstrual

Description : Assertion : All Eutherian are placental mammals . Reason : All placental mammals have menstrual

Last Answer : Assertion : All Eutherian are placental mammals . Reason : All placental mammals have menstrual A. If ... D. If both Assertion & Reason are False.

If other fuels such as fossil fuels, etc. had not been discovered, would whales of today be raised in whale hatcheries for their whale oil, or would they be all but extinct do to the lust for their oil?

Description : If other fuels such as fossil fuels, etc. had not been discovered, would whales of today be raised in whale hatcheries for their whale oil, or would they be all but extinct do to the lust for their oil?

Last Answer : answer:A whale hatchery wouldn’t be too practical. They’d all be extinct now.

Life originated first in the primitive oceans. The evidences supporting this view a. Protoplasm and body fluids of all animals contain salt b. Moist simpler and lower animals are aquatic and marine c. Fossils of earliest animals obtained from rocks of marine origin d. All the above

Description : Life originated first in the primitive oceans. The evidences supporting this view a. Protoplasm and body fluids of all animals contain salt b. Moist simpler and lower animals are aquatic and marine c. Fossils of earliest animals obtained from rocks of marine origin d. All the above

Last Answer : d. All the above

Assertion `:` Faeces are brown coloured. Reason `,` Faeces contain brown pigment named sterocobilin formed by reduction of bile pigment.

Description : Assertion `:` Faeces are brown coloured. Reason `,` Faeces contain brown pigment named sterocobilin formed by reduction of bile pigment.

Last Answer : Assertion `:` Faeces are brown coloured. Reason `,` Faeces contain brown pigment named sterocobilin ... D. If both Assertion & Reason are false.

Assertion :- Cr belong to 4th period Reason :- Cr atom contain 4 shells.

Description : Assertion :- Cr belong to 4th period Reason :- Cr atom contain 4 shells.

Last Answer : Assertion :- Cr belong to 4th period Reason :- Cr atom contain 4 shells. A. If both Assertion & ... is False. D. If both Assertion & Reason are false

Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk.

Description : Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk.

Last Answer : Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk ... D. If both Assertion & Reason are False.

Assertion : - Circulatory system of cockroach does not contain any capillary. Reason :- Blood of cockroach does not contain any respiratory pigment.

Description : Assertion : - Circulatory system of cockroach does not contain any capillary. Reason :- Blood of cockroach does not contain any respiratory pigment.

Last Answer : Assertion : - Circulatory system of cockroach does not contain any capillary. Reason :- Blood of cockroach does not contain ... . A. A B. B C. C D. D

Assertion (A) : Some carbonaceous aerosols may be carcinogenic. Reason (R) : They may contain polycyclic aromatic hydrocarbons (PAHs). (A) Both (A) and (R) are correct and (R) is the correct explanation of (A). (B) Both (A) and (R) are correct but (R) is not the correct explanation of (A). (C) (A) is correct, but (R) is false. (D) (A) is false, but (R) is correct.

Description : Assertion (A) : Some carbonaceous aerosols may be carcinogenic. Reason (R) : They may contain polycyclic aromatic hydrocarbons (PAHs). (A) Both (A) and (R) are correct and (R) is the correct explanation of (A). (B) Both ... (C) (A) is correct, but (R) is false. (D) (A) is false, but (R) is correct.

Last Answer : Answer: A

Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Description : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Last Answer : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic ... but reason is wrong D. Both are wrong

Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary productivity is produced by hetrotrophs.

Description : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary productivity is produced by hetrotrophs.

Last Answer : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary ... If both assertion and reason are false.

Assertion: Secondary succession taked place i recently. Reason : It is caused due to baing of an area.

Description : Assertion: Secondary succession taked place i recently. Reason : It is caused due to baing of an area.

Last Answer : Assertion: Secondary succession taked place i recently. Reason : It is caused due to baing of an area ... . D. If both assertion and reason are false.

Assertion : In stem, pericycle take active part in secondary growth. Reason : In dicots, pericycle has the capacity to produce lateral roots.

Description : Assertion : In stem, pericycle take active part in secondary growth. Reason : In dicots, pericycle has the capacity to produce lateral roots.

Last Answer : Assertion : In stem, pericycle take active part in secondary growth. Reason : In dicots, pericycle has ... D. If both assertion and reason are false.

Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .

Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .

Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.

Assertion: Many plants are propagated vegetatively even though they bear seeds. Reason: Potatoes multiply by tubers, apple by cutting etc.

Description : Assertion: Many plants are propagated vegetatively even though they bear seeds. Reason: Potatoes multiply by tubers, apple by cutting etc.

Last Answer : Assertion: Many plants are propagated vegetatively even though they bear seeds. Reason: Potatoes ... both the assertion and reason are false.

Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases. (a) Both A & R are true and R is the correct explanation of A (b) Both A & R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) Both A & R are false.

Description : Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases ... A. (c) A is true but R is false. (d) Both A & R are false.

Last Answer : (a) Both A & R are true and R is the correct explanation of A

Assertion (A): Money in our pocket cannot buy us all the things we need to live. Reason (R): Money cannot buy us a pollution free environment, unadulterated medicines and pollution free environment etc. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true and R is the not correct explanation of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Description : Assertion (A): Money in our pocket cannot buy us all the things we need to live. Reason (R): Money cannot buy us a pollution free environment, unadulterated medicines and pollution free environment etc. a) Both A and ... of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Last Answer : a) Both A and R are true and R is the correct explanation of A.