Description : Most fish do not sink in water because of the presence of (1) air sinuses (2) buoyant scales on the body (3) swim bladder (4) swimmerets
Last Answer : swim bladder
Description : In which one of the following is swim bladder absent? (1) Cutdefish (2) Bony fish (3) Cartilaginous fish (4) Silverfish
Last Answer : (3) Cartilaginous fish Explanation: The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current ... years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
Description : In which one of the following is swim bladder absent ? (1) Cuttlefish (2) Bony fish (3) Cartilaginous fish (4) Silverfish
Last Answer : Cartilaginous fish
Description : The presence of air sacs is a feature of which class ?
Last Answer : The presence of air sacs is a feature of the Aves class.
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.
Description : A doctor advises a patient to take plenty of citrus fruits, guavas, tomatoes and amlas over a period of two months regularly. What do you think is the complaint of the patient? (a) Softness and ... skin of angle of mouth (d) Extreme weakness, swelling and pain in legs, loss of appetite, headache
Last Answer : Ans:(b)
Description : The Council of Ministers and the Prime Minister sink and swim together. -SST 10th
Last Answer : The Council of Ministers and the Prime Minister sink and swim together as they are collectively responsible to the Lok Sabha. If a No-Confidence Motion is passed, the whole Council of Ministers has to resign or if the Prime Minister resigns, the Council of Ministers dissolved.
Description : How does the swim bladder of fishes work allowing fishes to control their depth under water?
Last Answer : From Hydrostatics it is known that an object does not sink if its density is equal or less than the density of the fluid in which it is immersed. When the swim bladder is filled by gas it ... and when it is emptied this density is increased. So this mechanism controls the fish depth under water.
Description : Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of (a) inspiratory reserve volume (b) tidal volume (c) expiratory reserve volume (d) residual volume.
Last Answer : (d) residual volume.
Description : Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of: (1) Inspiratory Reserve Volume (2) Tidal Volume (3) Expiratory Reserve Volume (4) Residual Volume
Last Answer : (4) Residual Volume
Description : How important is the presence of air bladder in Pisces? -Biology
Last Answer : answer:
Description : Air bladder in fish acts as : (1) Accessory respiratory organ (2) Hydrostatic organ (3) Both accessory respiratory organ and hydrostatic organ (4) Primary respiratory organ
Last Answer : Hydrostatic organ
Description : In mammals, the testes occur in scrotal sacs outside the abdomen because of the
Last Answer : In mammals, the testes occur in scrotal sacs outside the abdomen because of the A. ... deferens D. Requirement of low temperature for spermatogenesis
Description : What is the term for the tiny air sacs in the lungs?
Last Answer : Alveoli
Last Answer : The number of air sacs in the lungs is 18 crores
Description : Air sacs are found only inn
Last Answer : Air sacs are found only inn A. Aquatic birds B. Ground birds C. All birds D. No bird
Description : Lining of blood vessel and air sacs of lungs are made up of : -
Last Answer : Lining of blood vessel and air sacs of lungs are made up of : - A. Squamous ... Epithelium C. Cuboidal Epithelium D. Pseudo stratified Epithelium.
Description : What are The air sacs in your lungs that create a large surface area for diffusion called?
Last Answer : Need answer
Description : What vertebrates have air sacs attached to their lungs that make lungs more efficient?
Description : Why do brads not have respiratory trouble at the time of flying at high all? (1) Their lungs are very large (2) They fly inactively (3) They have extra air sacs (4) They use less
Last Answer : (3) They have extra air sacs Explanation: The avian respiratory system delivers oxygen from the air to the tissues and also removes carbon dioxide. In addition, the respiratory system plays an ... play an important role in respiration (but are not directly involved in the exchange of gases).
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
Description : Why do brids not have respiratory trouble at the time of flying at high altitude ? (1) Their lungs are very large (2) They fly inactively (3) They have extra air sacs (4) They use less oxygen
Last Answer : They have extra air sacs
Description : One finds it more difficult to walk on ice than on a concrete road because (a) ice is soft and spongy whereas concrete is hard (b) the friction between the ice and the feet is less than that between the concrete and the feet (c) there is more friction on ice than on concrete (d) it is not true
Description : Leaves of many grasses are capable of folding and unfolding because (1) their mesophyll is not differentiated into palisade and spongy parenchyma (2) they have stomata on both sides of the leaf (3) they have high levels of silica (4) they have specialised bulliform cells
Last Answer : (4) they have specialised bulli-form cells Explanation: Bulliform cells are large, bubbleshaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. These cells, by their turgor changes, cause rolling and unrolling of the leaves thus regulating water loss.
Description : Bakeries use yeast in bread-making because it – (1) makes the bread hard (2) makes the bread soft and spongy (3) enhances the food values (4) keeps the bread fresh
Last Answer : (2) makes the bread soft and spongy Explanation: Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
Description : Dough kept overnight in warm weather becomes soft and spongy because of (a) absorption of carbon dioxide from atmosphere (b) fermentation (c) cohesion (d) osmosis.
Last Answer : (b) fermentation
Last Answer : they have specialised bulliform cells
Description : Bakeries use yeast in breadmaking because it (1) makes the bread hard (2) makes the bread soft and spongy (3) enhances the food values (4) keeps the bread fresh
Last Answer : makes the bread soft and spongy
Description : What is the function of the air spaces in the spongy mesophyll? -Biology
Description : Why are there air spaces in the spongy mesophyll? -Biology
Description : Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten (A) Saturated polyester (B) Polyurethane (C) Polystyrene (D) Either (B) or (C)
Last Answer : (D) Either (B) or (C)
Description : Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following. (a) Tyloses in vessels (b) Closure of stomata (c) Flaccidity of bulliform cells (d) Shrinkage of air spaces in spongy mesophyll
Last Answer : (c) Flaccidity of bulliform cells
Description : Why would putting fish into a sink hole full of water cause the city to finally respond, after "years" of ignoring the problem?
Last Answer : You know what was annoying about that article? While I was reading it, a video commercial started playing automatically.
Description : What ladders do hydropower plants install to help the fish swim upstream to reproduce?
Last Answer : Because gowrj rowg
Description : Find out which one in the given options has the same relationship with the third object as the first and second are related: Swim is to Fish as Walk is to _________. A. Man B. Bird C. Chair D. Legs
Last Answer : ANSWER: A
Description : Presence of stones in gall bladder cause (a) Failure of kidney (b) Dysentry (c) Obstructive jaundice (d) Anaemia
Last Answer : (c) Obstructive jaundice
Description : Hello, does the gas bladder in fish also serve to keep the body in balance in addition to buoyancy? Please, give me an advice.
Last Answer : I think so.
Description : How is a fish bladder the same as an existing human invention?
Last Answer : A ballon because when you blow it up with air it floats like a fish bladder and when you let out the air it sinks like a fish bladder.
Description : Which of the following conditions related to smoking involves damage to the alveoli sacs? A. Lung Cancer B. Atherosclerosis C. Emphysema (Answer) D. Asthma
Last Answer : C. Emphysema (Answer)
Description : What is with dogs and emptying their anal sacs?
Last Answer : Sometimes it can be dietary, in that too soft a stool will not exert enough pressure to expel the sacs. You can do it yourself, but it requires training, and it is also quite noxious. I suggest you speak to your vet.
Description : Improper tooth cleaning?
Last Answer : Improper dental care and usually causes untreated or late-treated caries
Description : The structures that are formed by stacking of organized flattered membrances sacs in the chloroplasts are
Last Answer : The structures that are formed by stacking of organized flattered membrances sacs in the chloroplasts are A ... B. Cristae C. Grana D. Stroma lamellae
Description : Scrotal sacs of man and rabbit are connected with the abdominal cavity by
Last Answer : Scrotal sacs of man and rabbit are connected with the abdominal cavity by A. Inguinal canal B. Haversian canal C. Vagina cavity D. Spermatic canal.
Description : Scrotal sacs of man is connected with the abdominal cavity by-
Last Answer : Scrotal sacs of man is connected with the abdominal cavity by- A. Inguinal canal B. Haversian canal C. Vaginacavity D. Spermatic canal
Last Answer : The structures that are formed by stacking of organized flattered membrances sacs in the chloroplasts are ... B. Stroma lamellae C. Stroma D. Cristae
Description : What Thylakoids are membrane sacs that contain?
Last Answer : chlorophyll
Description : .In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule
Last Answer : (a) nucellus or integuments
Description : Which one of the following cellular parts is correctly described? (a) Thylakoids - flattened membranous sacs forming the grana of chloroplasts (b) Centrioles - sites for active RNA synthesis (c) Ribosomes - ... cytoplasm are smaller (70S) (d) Lysosomes - optimally active at a pH of about 8.5
Last Answer : (a) Thylakoids - flattened membranous sacs forming the grana of chloroplasts
Description : The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are (a) stroma lamellae (b) stroma (c) cristae (d) grana.
Last Answer : (d) grana.