Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1001.

Question : Trisomy of sex-chromosome result in,

Answer»

TURNER SYNDROME
Patau syndrome
Down syndrome
Klinefeiters syndrome

Answer :C
Discussion
1002.

Question : "Trilobite" : "Invertebrate Fossil" :: "Dinosaur skull :................"

Answer»

SOLUTION :VERTEBRATE FOSSIL
Discussion
1003.

Question : Treatment with alloxan destroys the

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sertoli CELLS
LEYDIG cells
`BETA`-cells of PANCREATIC islets
STH cells

Answer :C
Discussion
1004.

Question : Transpiration is a necessary evil. Justifly the statement by highlighting the harmfuland useful aspectsof thisprocess.

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Solution :Transpiration is a necessary evil. This statementcan be justified by listing the SIGNIFICANCE of transpiration which out weighs its HARMFUL impacts.
Significance of transpiration :
(i)Transpiration creates transpiration pull for absorption and transport of water up through the xylem in plants.
(ii) It supplies water for photosynthesis.
(iii) Ittransportsminerals from the soil to all parts of the plant.
(iv)As evaporation causes cooling, transpiration assists in cooling of leaves. Not allthe solar radiationsabsorbed by leaves are used in photosynthesis, but some will cause heating of leaves, Transpiration however reducesthe heating of leaves.
(v)Transpiration maintains the shape and structure of the plants by keeping the cells TURGID.
(vi)Transpiration removes excess amountof water.
Transpiration as evil :
(1) Since transpiration involves removal of excess amount of water , it causes flaccidity in cells.
(2)At high TEMPERATURE stomatal closure occurs due to transpiration.
(3)Plant exhibit wiltingif transpiration exceeds the amount of water absorbed.
Discussion
1005.

Question : Transpirationisa necessaryevilin plantsExplain.

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Solution :Transpiration is a necessary evil in plants, because it is an inevitable, but POTENTIALLY HARMFUL. Loss of water from the plant results wilting and cause death of a plant, if a condition of drought is experienced.
But transpiration is a great significance for the plant.
(a) Water is conducted, in most tall plants due to transpiration PULL.
(b) Minerals dissolved in water are distributed through out the plant body by Transpiration Stream
(c) Evaporation of water from the cells of leaves has cooling effect on plants.
(d) Wet SURFACE of leaf cells allow gaseous EXCHANGE.
Discussion
1006.

Question : Transfer of pollen from one flower to another of same species is termed as __________ .

Answer»

SOLUTION :CROSS POLLINATION
Discussion
1007.

Question : Traits transmitted from parents to offspring during reproduction show

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only SIMILARITIES with PARENTS.
only VARIATION with parents.
both similarities and variation with parents.
neither similarities nor variations.

Solution :OFFSPRING exhibit similarities as well as variation from parents.
Discussion
1008.

Question : Tracheal respiration occurs in

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earthworm
INSECTS
protists
fish

Solution :Insects have NETWORK of tubes called TRACHEAE which communicates withoutside air through spiracles.
Discussion
1009.

Question : Trace the path of sperm during ejaculation and mention the gland and their functions associated with the male reproductive system.

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Solution : Sperm comes out from TESTIS into the vas deferens and then PASSES through urethra before ejaculation. The secretions of SEMINAL vesicle and PROSTRATE glands provide nutrition to the sperms and also facilitate their transport.
Discussion
1010.

Question : Trace the pathway followed by water molecules from the time it enters a plant root to the time it escapes into the atmosphere from a leaf.

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SOLUTION :
Discussion
1011.

Question : Total number of bones present in forelimb of man is

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25
26
30
24

Answer :C
Discussion
1012.

Question : Too short an eyeball or too flat a lens produces

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near-sightedness
ASTIGMATISM
myopia
hypermetropia

Answer :D
Discussion
1013.

Question :Tobacco is obtained from the Tobacco plant ............. and .............

Answer»

SOLUTION :NICOTIANA tobaccum and Nicotiana rustica
Discussion
1014.

Question : Tobacco consumption is known to stimulate secretion of adrenaline. The componemt causing this could be

Answer»

NICOTINE
TANNIC acid
Curcumin
Leptin

SOLUTION :Nicotine
Discussion
1015.

Question : Toadstools (Agaricus) cannot manufacture their own food because

Answer»

they do not have leaves
they do not have chlorophyll
they do not NEED FOOD for their growth
they do not have roots

Answer :B
Discussion
1016.

Question : Tobacco chewing does not cause oral cancer.

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SOLUTION :Correct STATEMENT: TOBACCO chewing CAUSES oral cancer.
Discussion
1017.

Question : To which part of the brain communication and memory are associated ?

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SOLUTION :CEREBRUM
Discussion
1018.

Question : To which of the taxonomic groups does whale belong?

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Fishes
Reptilia
Mammalia
Arthropoda 

ANSWER :C
Discussion
1019.

Question : To visit a town or village after a few years of absence, note down the major developmental changes there. impliesMajor developmental changes in a village are, (i) New roads have been built (ii) New houses have been constructed. (iii) Factory and new market have been setup.Make a list of the materials for making roads and buildings with their probable sources.

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SOLUTION :
Discussion
1020.

Question : To visit a town or village after a few years of absence, note down the major developmental changes there. impliesMajor developmental changes in a village are, (i) New roads have been built (ii) New houses have been constructed. (iii) Factory and new market have been setup. What are the ways in which the materials used in construction can be reduced ?

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Solution :(1) ROADS can be built with cement or with polymer plastic mix instead of coaltar.
( 2 ) By using cement and iron to make BEAMS and by using aluminium or fibreglass to make WINDOWS and doors, we can reduce the USAGE of wood.
Discussion
1021.

Question : To suggest rule for inheritance of earlobe type. Procedure /Method : rarr The lowest part of the ear pinna called the earlobe, is closely attached to the side of the head, i.e., attached or not, i.e., free. rarr Observe the earlobes of all the students in the class. Prepare a list of students. Enter the data about the earlobes whether they are free or attached. rarr Find out about the earlobes of the parents of each student in the class. rarr Correlate earlobe type of each student with that of their parents. rarr In the column write F for free earlobe and A for attached earlobe. Answer the following questions on the basis of the collected data: Determine the percentage of free earlobe and attached earlobe in the students of your classroom.

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Solution :There are 60 students in the classroom. Out of which 51 students have FREE earlobe and 9 students have attached earlobe.
PERCENTAGE of free earlobe `= (51)/(60)xx100 = 85%`
Percentage of attached earlobe = `(9)/(60)xx100= 15%`
Discussion
1022.

Question : To suggest rule for inheritance of earlobe type. Procedure /Method : rarr The lowest part of the ear pinna called the earlobe, is closely attached to the side of the head, i.e., attached or not, i.e., free. rarr Observe the earlobes of all the students in the class. Prepare a list of students. Enter the data about the earlobes whether they are free or attached. rarr Find out about the earlobes of the parents of each student in the class. rarr Correlate earlobe type of each student with that of their parents. rarr In the column write F for free earlobe and A for attached earlobe. Answer the following questions on the basis of the collected data: From your collected data state which expression is dominant and which one is recessive for earlobe.

Answer»

Solution :Free EARLOBE is dominant and attached earlobe is RECESSIVE EXPRESSION.
Discussion
1023.

Question : To suggest rule for inheritance of earlobe type. Procedure /Method : rarr The lowest part of the ear pinna called the earlobe, is closely attached to the side of the head, i.e., attached or not, i.e., free. rarr Observe the earlobes of all the students in the class. Prepare a list of students. Enter the data about the earlobes whether they are free or attached. rarr Find out about the earlobes of the parents of each student in the class. rarr Correlate earlobe type of each student with that of their parents. rarr In the column write F for free earlobe and A for attached earlobe. Answer the following questions on the basis of the collected data: Are the types of earlobes hereditary?

Answer»

SOLUTION :YES, the TYPE of EARLOBE is HEREDITARY.
Discussion
1024.

Question : To suggest rule for inheritance of earlobe type. Procedure /Method : rarr The lowest part of the ear pinna called the earlobe, is closely attached to the side of the head, i.e., attached or not, i.e., free. rarr Observe the earlobes of all the students in the class. Prepare a list of students. Enter the data about the earlobes whether they are free or attached. rarr Find out about the earlobes of the parents of each student in the class. rarr Correlate earlobe type of each student with that of their parents. rarr In the column write F for free earlobe and A for attached earlobe. Answer the following questions on the basis of the collected data: Which expression of earlobe is observed more in number in your class?

Answer»

SOLUTION :EXPRESSION of FREE earlobe is OBSERVED more in number in our class.
Discussion
1025.

Question : To study the vegetative propagation in potato. Apparatus : Tray, cotton Material : Potato Procedure : rarr Take potato tuber and observe its surface. rarr Observe the pits on its surface and bud present in the pit. rarr Make circle around them with the help of marker. rarr Cut the potato into small pieces in such a way that, some of them possess bud. rarr Now put wet cotton in the tray and put the potato pieces on it. rarr Water for some days in tray, so that cotton remains wet. rarr Observe the changes that occur in the potato piece. Which other plants except potato produce buds for vegetative propagation ?

Answer»

SOLUTION :BULBS of Ginger, amorphophalus, PRODUCE buds for vegetative propagation.
Discussion
1026.

Question : To study the vegetative propagation in potato. Apparatus : Tray, cotton Material : Potato Procedure : rarr Take potato tuber and observe its surface. rarr Observe the pits on its surface and bud present in the pit. rarr Make circle around them with the help of marker. rarr Cut the potato into small pieces in such a way that, some of them possess bud. rarr Now put wet cotton in the tray and put the potato pieces on it. rarr Water for some days in tray, so that cotton remains wet. rarr Observe the changes that occur in the potato piece. Which are the potato pieces, that give rise to fresh green shoots and roots ?

Answer»

SOLUTION :Only those POTATO PIECES having bud, give RISE to fresh green shoots and roots. etc.
Discussion
1027.

Question : To study the vegetative propagation in potato. Apparatus : Tray, cotton Material : Potato Procedure : rarr Take potato tuber and observe its surface. rarr Observe the pits on its surface and bud present in the pit. rarr Make circle around them with the help of marker. rarr Cut the potato into small pieces in such a way that, some of them possess bud. rarr Now put wet cotton in the tray and put the potato pieces on it. rarr Water for some days in tray, so that cotton remains wet. rarr Observe the changes that occur in the potato piece. Is potato tuber root or stem?

Answer»

SOLUTION :POTATO TUBER is STEM.
Discussion
1028.

Question : To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property :A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. State the advantages and limitations of using the solar cooker or solar water heater.

Answer»

SOLUTION :
Discussion
1029.

Question : To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property :A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. What temperature is achieved in solar cooker/solar water heater ?

Answer»

Solution :TYPICALLY solar cooker is designed to achieve `65^(@)C(150^(@)F)` temperature.
The temperature of WATER in the solar water heater is determined by the combination of collector area and the tank CAPACITY. Typically it would be `50-60^(@)C`, which is much hotter than the BATHING water temperature (around `40^(@)C`).
Discussion
1030.

Question : To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property :A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. Why is a glass sheet used ?

Answer»

SOLUTION :A glass SHEET is USED to creates GREENHOUSE effect.
Discussion
1031.

Question : To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property :A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. State energy conversion in solar cooker/solar water heater.

Answer»

SOLUTION :LIGHT energy/ SOLAR energy in converted to heat energy.
Discussion
1032.

Question : To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property :A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. How is heat reflected into the box ?

Answer»

SOLUTION :By using MIRROR, rays of sun reflect the HEAT into the box.
Discussion
1033.

Question : To show vegetative propagation by stem cuttings. Materials : Money-plant (pothos) Procedure: rarr Select a money-plant. Cut some pieces which contain at least one node of leaf. rarr Cut out some other portions between two leaves. rarr Dip one end of all the pieces in water. rarr Observe over the next few days. Can you give some other example to show vegetative propagation by stem cuttings ?

Answer»

SOLUTION :Rose, hibiscus, LEMON, SUGARCANE, tamarind, etc.
Discussion
1034.

Question : To show vegetative propagation by stem cuttings. Materials : Money-plant (pothos) Procedure: rarr Select a money-plant. Cut some pieces which contain at least one node of leaf. rarr Cut out some other portions between two leaves. rarr Dip one end of all the pieces in water. rarr Observe over the next few days. Observe over the next few days. State your conclusion.

Answer»

SOLUTION :NODE is ESSENTIAL in a STEM cutting for vegetative propagation of money-plant.
Discussion
1035.

Question : To show vegetative propagation by stem cuttings. Materials : Money-plant (pothos) Procedure: rarr Select a money-plant. Cut some pieces which contain at least one node of leaf. rarr Cut out some other portions between two leaves. rarr Dip one end of all the pieces in water. rarr Observe over the next few days. Which pieces grow and give rise to fresh leaves ?

Answer»

Solution :Those PIECES with at LEAST one NODE of leaf can grow and give rise to FRESH leaves.
Discussion
1036.

Question : To prevent the entry of food into the trachea the opening is guarded by

Answer»

glottis
hard palate
EPIGLOTTIS
soft palate

Solution :Epiglottis PREVENT the ENTRY of FOOD in the TRACHEA.
Discussion
1037.

Question : To prevent soil erosion,a farmer plants a hedge across a field. This method works because

Answer»

the hedge prevents the soil from direct impact of rainwater
the ROOTS of plants prevent soil EROSION
the hedge absorbs minerals from the soil, which MAKES it most compact
none of the above

Answer :B
Discussion
1038.

Question : To prevent pregnancy, copper-T is placed in ………………….

Answer»


ANSWER :UTERUS
Discussion
1039.

Question : To observe the response of plant parts to light OR To study phototropism in plants. Materials : Conical flask, wire mesh, cardboard box open from one side, water, two- three freshly germinated bean seeds. Procedure : rarr Fill a conical flask with water. rarr Cover the neck of the flask with a wire mesh. rarr Keep two-three freshly germinated bean seeds on the wire mesh. rarr Take a cardboard box which is open from one side. rarr Keep the flask in the box in such a manner that the open side of the box faces light coming from a window. rarr Observe after two or three days and note down your observation. rarr Now turn the flask and leave it undisturbed in this condition for a few days and then observe. Observation : In the initial position of flask, the shoot bends towards light and roots turn away from light. rarr After turning the flask, position of shoot and roots change, i.e., shoot goes away from light and roots turn towards light but after a few days shoot again shows bending towards light and roots move away from light. Are there differences in the direction of the new growth ?

Answer»

SOLUTION :No, growth PATTERN or DIRECTION FOLLOWS environmental stimulus.
Discussion
1040.

Question : To observe the response of plant parts to light OR To study phototropism in plants. Materials : Conical flask, wire mesh, cardboard box open from one side, water, two- three freshly germinated bean seeds. Procedure : rarr Fill a conical flask with water. rarr Cover the neck of the flask with a wire mesh. rarr Keep two-three freshly germinated bean seeds on the wire mesh. rarr Take a cardboard box which is open from one side. rarr Keep the flask in the box in such a manner that the open side of the box faces light coming from a window. rarr Observe after two or three days and note down your observation. rarr Now turn the flask and leave it undisturbed in this condition for a few days and then observe. Observation : In the initial position of flask, the shoot bends towards light and roots turn away from light. rarr After turning the flask, position of shoot and roots change, i.e., shoot goes away from light and roots turn towards light but after a few days shoot again shows bending towards light and roots move away from light. What can we conclude from this activity ?

Answer»

SOLUTION :We can CONCLUDE from this activity that shoot shows POSITIVE PHOTOTROPISM and roots SHOW negative phototropism.
Discussion
1041.

Question : To observe the response of plant parts to light OR To study phototropism in plants. Materials : Conical flask, wire mesh, cardboard box open from one side, water, two- three freshly germinated bean seeds. Procedure : rarr Fill a conical flask with water. rarr Cover the neck of the flask with a wire mesh. rarr Keep two-three freshly germinated bean seeds on the wire mesh. rarr Take a cardboard box which is open from one side. rarr Keep the flask in the box in such a manner that the open side of the box faces light coming from a window. rarr Observe after two or three days and note down your observation. rarr Now turn the flask and leave it undisturbed in this condition for a few days and then observe. Observation : In the initial position of flask, the shoot bends towards light and roots turn away from light. rarr After turning the flask, position of shoot and roots change, i.e., shoot goes away from light and roots turn towards light but after a few days shoot again shows bending towards light and roots move away from light. Have the old parts of the shoot and root changed direction ?

Answer»

SOLUTION :YES, shoot always GROWS towards light as it positively phototropic and root goes in opposite direction of light.
Discussion
1042.

Question : To observe the growth of fungus-Rhizopus on the piece of bread. Apparatus : Petridish, Magnifying glass. Material : Wet slice of bread. Procedure : rarr Wet a slice of bread in water. Now put the wet plece of bread in petridish. Keep the petridish in dark, moist and cool environment for a week. rarr Now observe the bread slice with help of magnifying glass. Reproduction through spore formation is which type of reproduction method ?

Answer»

SOLUTION :ASEXUAL REPRODUCTION.
Discussion
1043.

Question : To observe the growth of fungus-Rhizopus on the piece of bread. Apparatus : Petridish, Magnifying glass. Material : Wet slice of bread. Procedure : rarr Wet a slice of bread in water. Now put the wet plece of bread in petridish. Keep the petridish in dark, moist and cool environment for a week. rarr Now observe the bread slice with help of magnifying glass. Compare the growth of yeast and mould.

Answer»

Solution :Yeast is a TYPE of fungus that grows as a SINGLE cell. MOULD is a type of fungus that grows multicellular filamentous structures called HYPHAE. These tubular branches from a single organism have multiple, genetically identical nuclei.
The reproduction in yeast occurs by budding. Mould reproduces by FORMATION of sexual or asexual spores.
Discussion
1044.

Question : To observe the growth of fungus-Rhizopus on the piece of bread. Apparatus : Petridish, Magnifying glass. Material : Wet slice of bread. Procedure : rarr Wet a slice of bread in water. Now put the wet plece of bread in petridish. Keep the petridish in dark, moist and cool environment for a week. rarr Now observe the bread slice with help of magnifying glass. Why do spores of fungi germinate on the bread ?

Answer»

Solution :SPORES of fungi GERMINATE on the bread because on bread moist environment and NUTRIENTS are available.
Discussion
1045.

Question : To observe the growth of fungus-Rhizopus on the piece of bread. Apparatus : Petridish, Magnifying glass. Material : Wet slice of bread. Procedure : rarr Wet a slice of bread in water. Now put the wet plece of bread in petridish. Keep the petridish in dark, moist and cool environment for a week. rarr Now observe the bread slice with help of magnifying glass. Which fungi grow on the bread ?

Answer»

SOLUTION :RHIZOPUS FUNGI GROW on the BREAD.
Discussion
1046.

Question : To observe the growth of fungus-Rhizopus on the piece of bread. Apparatus : Petridish, Magnifying glass. Material : Wet slice of bread. Procedure : rarr Wet a slice of bread in water. Now put the wet plece of bread in petridish. Keep the petridish in dark, moist and cool environment for a week. rarr Now observe the bread slice with help of magnifying glass. What is seen on the slice of bread ?

Answer»

SOLUTION :NETWORK of white cotton fibres-like STRUCTURE is SEEN on the slice of bread.
Discussion
1047.

Question : To observe the different parts of seed. Materials : Seeds of Bengal gram (chana), water, wet cloth. Procedure : rarr Soak a few seeds of Bengal gram (chana) and keep them overnight. rarr Drain the excess water and cover the seeds with a wet cloth and leave them for a day. rarr Make sure that the seeds do not become dry. rarr Cut open the seeds carefully and observe the different parts. How is an embryo formed from zygote ?

Answer»

SOLUTION :The zygote divides several times to FORM an EMBRYO.
Discussion
1048.

Question : To observe the different parts of seed. Materials : Seeds of Bengal gram (chana), water, wet cloth. Procedure : rarr Soak a few seeds of Bengal gram (chana) and keep them overnight. rarr Drain the excess water and cover the seeds with a wet cloth and leave them for a day. rarr Make sure that the seeds do not become dry. rarr Cut open the seeds carefully and observe the different parts. Which parts in seed are known as future root and as future shoot ?

Answer»

SOLUTION :RADICLE is known as FUTURE ROOT and plumule as future shoot.
Discussion
1049.

Question : To observe the different parts of seed. Materials : Seeds of Bengal gram (chana), water, wet cloth. Procedure : rarr Soak a few seeds of Bengal gram (chana) and keep them overnight. rarr Drain the excess water and cover the seeds with a wet cloth and leave them for a day. rarr Make sure that the seeds do not become dry. rarr Cut open the seeds carefully and observe the different parts. Which are the structures seen in an embryo?

Answer»

SOLUTION :A RADICLE, plumule and cotyledons OCCUR in an embryo.
Discussion
1050.

Question : To observe the different parts of seed. Materials : Seeds of Bengal gram (chana), water, wet cloth. Procedure : rarr Soak a few seeds of Bengal gram (chana) and keep them overnight. rarr Drain the excess water and cover the seeds with a wet cloth and leave them for a day. rarr Make sure that the seeds do not become dry. rarr Cut open the seeds carefully and observe the different parts. What is the role of cotyledon in chana ?

Answer»

SOLUTION :COTYLEDONS STORE food nutrients in CHANA and PROVIDE these nutrients during seed germination.
Discussion