In mammals, the testes occur in scrotal sacs outside the abdomen because of the

In mammals, the testes occur in scrotal sacs outside the abdomen because of the
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In mammals, the testes occur in scrotal sacs outside the abdomen because of the A. ... deferens D. Requirement of low temperature for spermatogenesis
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The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for (a) maintaining the scrotal temperature lower than the internal body temperature (b) escaping any possible compression by the visceral organs (c) providing more space for the growth of epididymis (d) providing a secondary sexual feature for exhibiting the male sex.

Description : The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for (a) maintaining the scrotal temperature lower than the internal body ... growth of epididymis (d) providing a secondary sexual feature for exhibiting the male sex.

Last Answer : (a) maintaining the scrotal temperature lower than the internal body temperature

Scrotal sacs of man and rabbit are connected with the abdominal cavity by

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.

Scrotal sacs of man is connected with the abdominal cavity by-

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

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.

Testes descend into scrotum in mammals for

Description : Testes descend into scrotum in mammals for

Last Answer : Testes descend into scrotum in mammals for A. Spermatogenesis B. Fertilization C. Development of sex organs D. Development of visceral organs.

In mammals , the testes are located in

Description : In mammals , the testes are located in

Last Answer : In mammals , the testes are located in A. Abdominal cavity B. Thoracic cavity C. Extra-abdominal cavity D. Pericardial cavity

In mammals , failure of testes to descend into scrotum is known as

Description : In mammals , failure of testes to descend into scrotum is known as

Last Answer : In mammals , failure of testes to descend into scrotum is known as A. Paedogenesis B. Castration C. Cryptorchidism D. Impotency

Give reasons for the following (i)The human testes are located outside the abdominal cavity. (ii)Some organisms like honeybees are called parthenogenetic animals -Biology

Description : Give reasons for the following (i)The human testes are located outside the abdominal cavity. (ii)Some organisms like honeybees are called parthenogenetic animals -Biology

Last Answer : Testes are located outside the abdominal cavity within a pouch called scrotum. Scrotum maintains low temperature of the testes (2-2.5°C lower than normal body temp­erature) ... from unfertilised diploid eggs (and do not undergo fertilisation) they are called parthenogenetic animals.

Assertion : The testes are situated outside the abdominal cavity within scrotum . Reason : Lower temperature for the testis is necessary for spermatog

Description : Assertion : The testes are situated outside the abdominal cavity within scrotum . Reason : Lower temperature for the testis is necessary for spermatog

Last Answer : Assertion : The testes are situated outside the abdominal cavity within scrotum . Reason : Lower ... . If both Assertion & Reason are False.

What is scrotal bone ?

Description : What is scrotal bone ?

Last Answer : The eight chapatta and hard bones around the brain are called cortical bones.

Scrotal swelling?

Description : Scrotal swelling?

Last Answer : DefinitionScrotal swelling is abnormal enlargement of the scrotum, the sac surrounding the testicles.Alternative NamesSwelling of the scrotum; Testicular enlargementConsiderationsScrotal swelling can ... and the loss of a testicle.Common CausesCertain medical treatmentsCongestive heart failureE

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

Most fish do not sink in water because of the presence of: swim bladder; air bladder; air sacs; air in spongy bones?

Description : Most fish do not sink in water because of the presence of: swim bladder; air bladder; air sacs; air in spongy bones?

Last Answer : Iand II are correct

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.

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.

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

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

In man and mammals, air passes from outside into the lungs through (a) nasal cavity, larynx, pharynx, trachea, bronchi, alveoli (b) nasal cavity, larynx, pharynx, trachea, bronchioles, alveoli (c) nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli (d) nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli.

Description : In man and mammals, air passes from outside into the lungs through (a) nasal cavity, larynx, pharynx, trachea, bronchi, alveoli (b) nasal cavity, larynx, pharynx, trachea, bronchioles, ... bronchioles, bronchi, alveoli (d) nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli.

Last Answer : (d) nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli.

If the head of cockroach is removed, it may live for few days because (a) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen (b) the cockroach does not have nervous system(c) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body (d) the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

Description : If the head of cockroach is removed, it may live for few days because (a) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen (b) the cockroach does not have nervous ... a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

Last Answer : (c) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body

In mammals, Sertoli cells occur in

Description : In mammals, Sertoli cells occur in

Last Answer : In mammals, Sertoli cells occur in A. Germinal epithelium of testis B. Germinal epithelium of ovary C. Medulls of kidney D. Adrenal cortex.

.Hair occur in all mammals except those of (a) rodentia (b) chiroptera (c) primata (d) cetacea.

Description : .Hair occur in all mammals except those of (a) rodentia (b) chiroptera (c) primata (d) cetacea.

Last Answer : (d) cetacea.

What is with dogs and emptying their anal sacs?

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.

What is the term for the tiny air sacs in the lungs?

Description : What is the term for the tiny air sacs in the lungs?

Last Answer : Alveoli

The presence of air sacs is a feature of which class ?

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.

What is the number of air sacs in the lungs ?

Last Answer : The number of air sacs in the lungs is 18 crores

Why are dental sacs made?

Description : Improper tooth cleaning?

Last Answer : Improper dental care and usually causes untreated or late-treated caries

Air sacs are found only inn

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

The structures that are formed by stacking of organized flattered membrances sacs in the chloroplasts are

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

Lining of blood vessel and air sacs of lungs are made up of : -

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.

The structures that are formed by stacking of organized flattered membrances sacs in the chloroplasts are

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 ... B. Stroma lamellae C. Stroma D. Cristae

What are The air sacs in your lungs that create a large surface area for diffusion called?

Description : What are The air sacs in your lungs that create a large surface area for diffusion called?

Last Answer : Need answer

What vertebrates have air sacs attached to their lungs that make lungs more efficient?

Description : What vertebrates have air sacs attached to their lungs that make lungs more efficient?

Last Answer : Need answer

What Thylakoids are membrane sacs that contain?

Description : What Thylakoids are membrane sacs that contain?

Last Answer : chlorophyll

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

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).

Which of the following conditions related to smoking involves damage to the alveoli sacs? A. Lung Cancer B. Atherosclerosis C. Emphysema (Answer) D. Asthma

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)

.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

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

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 - those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S) (d) Lysosomes - optimally active at a pH of about 8.5

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

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.

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.

Match the columns and identify the correct option. Column I Column II A. Thylakoids (i) Disc-shaped sacs in Golgi apparatus B. Cristae (ii) Condensed structure of DNA C. Cisternae (iii) Flat membranous sacs in stroma D. Chromatin (iv) Infoldings in mitochondria (a) A-(iii), B-(i), C-(iv), D-(ii) (b) A-(iii), B-(iv), C-(ii), D-(i) (c) A-(iv), B-(iii), C-(i), D-(ii) (d) A-(iii), B-(iv), C-(i), D-(ii)

Description : Match the columns and identify the correct option. Column I Column II A. Thylakoids (i) Disc-shaped sacs in Golgi apparatus B. Cristae (ii) Condensed structure of DNA C. Cisternae (iii) Flat membranous sacs in stroma D. Chromatin (iv) ... iii), C-(i), D-(ii) (d) A-(iii), B-(iv), C-(i), D-(ii)

Last Answer : (d) A-(iii), B-(iv), C-(i), D-(ii)

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

Each chloroplast encloses a system of flattened, membranous sacs called (A) Cristae (B) Thylakoids (C) Plastids (D) Cisternae

Description : Each chloroplast encloses a system of flattened, membranous sacs called (A) Cristae (B) Thylakoids (C) Plastids (D) Cisternae

Last Answer : (B) Thylakoids

In flowers the terminal part of a stamen, containing the pollen sacs is known as the: a) anther b) style c) filament d) pistil

Description : In flowers the terminal part of a stamen, containing the pollen sacs is known as the: a) anther b) style c) filament d) pistil

Last Answer : ANSWER: A -- Anther

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

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

How does the flow of air occur in natural draught cooling towers? a) Natural pressure head density between cold outside air and humid inside air b) Variation in pressure of both cold outside air and humid inside air c) Due to the given air vents and vacuum ports d) Because of difference in the volume of both the of airs

Description : How does the flow of air occur in natural draught cooling towers? a) Natural pressure head density between cold outside air and humid inside air b) Variation in pressure of both cold outside air and ... given air vents and vacuum ports d) Because of difference in the volume of both the of airs

Last Answer : Natural pressure head density between cold outside air and humid inside air

How does the flow of air occur in natural draught cooling towers? a) Natural pressure head density between cold outside air and humid inside air b) Variation in pressure of both cold outside air and humid inside air c) Due to the given air vents and vacuum ports d) Because of difference in the volume of both the of airs

Description : How does the flow of air occur in natural draught cooling towers? a) Natural pressure head density between cold outside air and humid inside air b) Variation in pressure of both cold outside air and ... given air vents and vacuum ports d) Because of difference in the volume of both the of airs

Last Answer : Natural pressure head density between cold outside air and humid inside air

Does the left testes always hang lower than the right?

Description : Does the left testes always hang lower than the right?

Last Answer : answer:It completely depends upon which side of your brain is more dominant. For the small percentage of males that have an equally left and right brain dominance, their testicles are the same length. ... size or length or anything of a person's private bits. Cleanliness and health are what matters.

What are the hormones secreted by Gonads (Testes, Ovaries)? -Biology

Description : What are the hormones secreted by Gonads (Testes, Ovaries)? -Biology

Last Answer : answer:

Testes are internal and canines are premolar are absent in one of the following ?

Description : Testes are internal and canines are premolar are absent in one of the following ?

Last Answer : Testes are internal and canines are premolar are absent in one of the following ? A. Rabbit B. Elephant C. Whale D. Goat

Testes are extra abdominal in position. Which of the following is the must appropriste reason

Description : Testes are extra abdominal in position. Which of the following is the must appropriste reason

Last Answer : Testes are extra abdominal in position. Which of the following is the must appropriste reason A. ... @)C` lower than the normal body temperature.

Cryptorhidism is a condition of testes

Description : Cryptorhidism is a condition of testes

Last Answer : Cryptorhidism is a condition of testes A. Unable to descend in scrotal sacs B. Unable to ... been surgically removed D. Having remained undeveloped.

Gonads/testes develop from embryonic

Description : Gonads/testes develop from embryonic

Last Answer : Gonads/testes develop from embryonic A. Ectoderm B. Endoderm C. Mesoderm D. Both mesoderm and endoderm.

$ The reproductive cells in the testes are called spermatocytes. ! Labia majora is a part of the external genitalia of human females.

Description : $ The reproductive cells in the testes are called spermatocytes. ! Labia majora is a part of the external genitalia of human females.

Last Answer : $ The reproductive cells in the testes are called spermatocytes. ! Labia majora is a part of the external ... wrong D. If both As and R are wrong.