24277 + Interview Questions in Biology in Class 12 Page 68 InterviewSolution

3351.	Question : Mode of vegetative propagation in Pistia.
Answer» STOLON offset runner sucker Answer :B

Discussion

3352.	Question : Vegetative propagated plants :
Answer» CLONE of their Parent Show ADAPTIVE variations Better fitted for strugglefor existence STOUTER than parents Answer :A

Discussion

3353.	Question : Vegetative cell of pollen grain
Answer» Is smaller in size than its generative cell Has large irregularly shaped nucleus Floats in the cytoplasm of generative cell Is ABSENT in pollens which are shed at three called stage SOLUTION :MALE honey bees are produced pathenogenetically from UNFERTILISED eggs Male honey bees are haploid invididuals and they produce gemetes by mitosis

Discussion

3354.	Question : Vegetative propagation is observed in :
Answer» BANYAN BRYOPHYLLUM Ipomea RHIZOPHORA ANSWER :D

Discussion

3355.	Question : Vegetative fertilization is also called (A) triple fusion (B) true fertilization (C) syngamy (D) generative fertilization
Answer» triple FUSION TRUE fertilization SYNGAMY generative fertilization ANSWER :A

Discussion

3356.	Question : Vegetative fertilisation is also called :
Answer» TRIPLE fusion True fertilisation Syngamy Generative fertilisation Answer :A

Discussion

3357.	Question : vegetation in any area depends on
Answer» PH of SOIL MINERAL composition topography all of the above ANSWER :D

Discussion

3358.	Question : Vegetaively propagated plants are
Answer» GENETICALLY similar Genetically dissimilar Donot BEAR roots Donot for buds Answer :A

Discussion

3359.	Question : Vegetatively propagated plants
Answer» CLONE of their parent Show ADAPTIVE variations Better FITTED for STRUGGLE for existence Stouter than parents Answer :A

Discussion

3360.	Question : Vegetables commercially produced through hydroponics are
Answer» Potato Seedless cucumber Lettuce Both(2) and (3) ANSWER :D

Discussion

3361.	Question : Vavilov has given _____ main centres of origin of plants.
Answer» 7 9 8 10 Answer :C

Discussion

3362.	Question : Vector for T-DNA is
Answer» SALMONELLA typhimurium Thermus aquaticus Agrobacterium tumefacians Escherichia coli Answer :C

Discussion

3363.	Question : Vast area of vegetation is destroyed mostly by fires and it results in clearing of lush vegetation. How long it takes to re-form climax community. Name the process is related in the above case.
Answer» SOLUTION :TIME taken is about 50-100 YEARS in case of a grassland and about 100-200 years for a forest. SECONDARY succession.

Discussion

3364.	Question : Vaxillary type of petal arrangemant occurs in
Answer» Maize Cururbita Mustard Pea/Crotalaria Answer :D

Discussion

3365.	Question : Vasopressin and cortisol related with following activities performed inside the body :- (a) Vasopressin secreted from posterior adrenal gland where cortisol from ant. pitutary gland (b) Vasopressin stimulates reabsorption of electrolytes by distal tubules and cortisol releated with maintance of cardio vascular system. (c) Cortisol related to RBC formation where vasopressin reduces loss of water. (d) Vasopressin is anti diuretic where cortisol is life saving substance of endocrine glands
Answer» a and B are TRUE where C and d are FALSE. a, b, c are true where only d is false a is true where b, c, d are false a is false where b, c, d are true Answer :D

Discussion

3366.	Question : Vasectomy is the surgical cutting of _____.
Answer» ANSWER :VASA DEFERENTIA

Discussion

3367.	Question : Vascular tissue in higher plants develop from which of the following :?
Answer» PROCAMBIUM Protoderm Periblem Cortex Answer :A

Discussion

3368.	Question : Vascular rays are formed by the activity of -
Answer» FUSIFORM initials Ray initials Phellogen Wound cambium Answer :B

Discussion

3369.	Question :Vascular plants lacking vessels and companion cells are
Answer» Angiosperm Algae Bryophytes Gymnosperms Answer :D

Discussion

3370.	Question : Vascular grafting during CABG is an example of :-
Answer» AUTO grafting Allo or HOMO grafting Xeno or HETERO grafting Iso or SYN grafting Answer :A

Discussion

3371.	Question : Vascular cylinder in dicot stems occurs in the form of distinctly separated vascular bundles. But, in some dicot stems, e.g. Linum, Lonicera, it appears to be a continuous cylinder because
Answer» interfasciular region is not developed at all the interfascicular region is there, but its cells are not differentiable from the cells of vascular BUNDLES interfacicular region is extremely NARROW continuous vascular cylinder differentiates since, the EARLY STAGE of development ANSWER :D

Discussion

3372.	Question : Vascular Cambium is essential for :-
Answer» Parthenocarpy Grafting Cutting Layering Answer :B

Discussion

3373.	Question : Vascular cambium and cork cambium are
Answer» APICAL meristem Intercalary meristem Lateral meristem Primary meristem Answer :C

Discussion

3374.	Question : vascular cambium cuts off both xylem and phloem on the inner side in
Answer» ficus Entada Orobanche Quercus. Answer :B

Discussion

3375.	Question : Vascular bundle of monocot is
Answer» Scattered Endarch Closed All of these Answer :D

Discussion

3376.	Question : Vascular and exceretory organs are formed from
Answer» Endoderm Mesoderm Ectoderm Mesendoderm Solution :(B) Derivatives of Mesoderm 1. All muscles (except muscles of iris) of BODY. 2. All connective tissue (ligament, tendons, dermis of skin cartilage, bone, blood)/skeleton 3. Blood vascular system (Heart, blood and blood vessels) 4. Excretory system (except URINARY bladder and urethra) 5. Reproductive system (except prostate gland)/GONADS or testes 6. DESTINE of teeth 7. Eye (sclera, choroid, ciliary body and iris) 8. Adrenal cortex 9. Spleen 10. Pleura and pericardium 11. NOTOCHORD

Discussion

3377.	Question : Vasa recta is the continuation of
Answer» AFFERENT arteriole efferent arteriole renal vein renal nerve Answer :B

Discussion

3378.	Question : Vasa efferentia - vasa deferens
Answer» Solution :Vasa EFFERENTIA : It is LOCATED inside testis. It transfers sperms produced in seminiferous TUBULES into vasa efferentia. Sperms are transformed by vasa efferentia into epididymis. Vas deferens : Epididymis pushes sperms into vas deferens.

Discussion

3379.	Question : Vasa efferentia end in and vasa deferentia start from the following regions of epididymis respetively.
Answer» CAPUT EPIDIDYMIS & CAUDA epididymis Caput epididymis & CARPUS epididymis Cauda epididymis & caput epididymis Cauda epididymis & carpus epididymis Answer :A

Discussion

3380.	Question : Vasa efferentia are the ductules leading from
Answer» TESTICULAR lobules to RETE testis rete testis to EPIDIDYMIS vas DEFERENS to epididymis epididymis to urethra Answer :B

Discussion

3381.	Question : Vas deferens is about………….long tube.
Answer» 45 cm 40 cm 30 cm 35 cm Answer :A

Discussion

3382.	Question : Various steps involved in mechanism of vision are given below in the form of a flow chart light>photoreceptor cells>A>generate potential difference in photoreceptor cells>B>C>visual cortex in brainCHOOSE THE OPTION WHICH GIVES THE ANSWER FOR A B and C
Answer» A 1Formation of photopigment GANGLION CELL BIPOLAR CELLS Dissociation of photopigment Bipolar cells Ganglion cells Formation of photopigment Bipolar cells Ganglion cells photomigments Dissociation of photopigment Ganglion cells Bipolar cells Answer :D

Discussion

3383.	Question : Various chemical substances inhibit respiration at various steps. Find out the incorrectly matched pair :-
Answer» CYANIDE – Prevents flow of electrons from cyt. `a_(3)` to `O_(2)` 2, 4-DNP – Prevents SYNTHESIS of ATP from ADP and `Pi Rotenone – Prevents transfer of electron from cyt b to cyt `C_(1)` CO – Prevents flow of electrons from cyt `a_(3)` to `O_(2)` ANSWER :C

Discussion

3384.	Question : Various stages of succession are given bellow. From that rearrange them accordingly. Find out the type of succession and explain in detail. Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage and marsh medow stage.
Answer» Solution :1. PHYTOPLANKTON stage - It is the first stage of succession consisting of the pioneer community like blue green ALGAE, green algae, diatoms, bacteria, etc., The colonization of these organisms enrich the amount of organic matter and nutrients of pond due to their life activities and death. This favors the development of the next seral stages. 2. Submerged plant stage - As the result of death and decomposition of planktons, SILT brought from land by rain water, lead to a loose mud formation at the bottom of the pond. Hence, the rooted submerged hydrophytes begin to appear on the new substratum. Example: Vallisneria and Hydrilla etc. The death and decay of these plants will build up the substratum of pond to become shallow. 3. Submerged free floating stage - During this stage, the depth of the pond will become almost 2-5 feet. Hence, the rooted hydrophytic plants and with floating large leaves start colonising the pond. Example: Rooted floating plants like Nelumbo, Nymphaea and some free floating species like Azolla, and Pistia are also present in this stage. By death and decomposition of these plants, further the pond becomes more shallow. 4. Reed-swamp stage - It is also called an amphibious stage. During this stage, rooted floating plants are replaced by plants which can live successfully in aquatic as well as aerial environment. Example: Typha, Phragmites, Sagittaria and Scirpus etc. At the end of this stage, water level is very MUCH reduced, making it unsuitable for the continuous growth of amphibious plants. 5. Marsh meadow stage - When the pond becomes swallowed due to decreasing water level, species of Cyperaceae and Poaceae colonise the area. They form a mat-like vegetation with the help of their much branched root system. This leads to an absorption and loss of large quantity of water. At the end of this stage, the soil becomes dry and the marshy vegetation disappears gradually and leads to shurb stage. 6. Shrub stage - Here areas are invaded by terrestrial plants like shrubs (Salix and Cornus) and trees (Populus and Alnus). These plants absorb large quantity of water and make the habitat dry. Further, the accumulation of humus with a rich flora of microorganisms produce minerals in the soil, ultimately favouring the arrival of new tree species in the area. 7. Forest stage - It is the climax community of HYDROSERE. A variety of trees invade the area and develop any one of the diverse type of vegetation Example: Temperate mixed forest (Ulmus, Acer and Quercus), Tropical rain forest (Artocarpus and Cinnamomum ) and Tropical deciduous forest (Bamboo and Tectona).

Discussion

3385.	Question : Various parts of male urethra are
Answer» PROSTATIC, bulbourebral and ejaculatory Prostatic, membranous and penile Corpora CAVERNOSA and corpus spongiosum Prostatic, BULBOURETHRAL and glans. ANSWER :B

Discussion

3386.	Question : Variety of species are present around us. What they constitute ? Comment.
Answer» SOLUTION :Biodiversity Biological diversity means the variety of life forms -OCCURRENCE of different types of genes,species and ECOSYSTEM in a region.

Discussion

3387.	Question :Variegated leaf experiment demonstrates that
Answer» Water is NECESSARY for PHOTOSYNTHESIS Carbon dioxide is necessary for Photosynthesis OXYGEN is necessary for Photosynthesis Chlorophyll necessary for Photosynthesis Answer :D

Discussion

3388.	Question : Variations in gene frequecies withinpopulations can occur by chance ratherthan by natural selection. Thisis referred to as :
Answer» Geneticflow Geneticdrift RANDOM mating GENETICS load ANSWER :B

Discussion

3389.	Question : Variations during mutations of meiotic recombinations are
Answer» RANDOM and directionless random and directional random and SMALL random, small and directional Answer :A

Discussion

3390.	Question : Variations caused by mutation, as proposed by Hugo de Vries, are
Answer» RANDOM and DIRECTIONAL random and DIRECTIONLESS SMALL and directional small and directionless SOLUTION : random and directionless

Discussion

3391.	Question : Give scientific reasons.Variations are expected in sexually reproducing organisms.
Answer» Solution :Sexual reproduction involves formation of gametes in the gonads, meiosis and FUSION of gametes. These PROCESSES produces variations due to new COMBINATIONS of genes due to crossing over, change segragation of chromosome and chance fusion of gametes. Daughter offsprings are genetically different from the PARENTS. Sexual reproduction thus, is a source of variation in the POPULATION.

Discussion

3392.	Question : Variation is appearing during tissue culture are called_______________.
Answer» ANSWER :Somaclonal VARIATIONS

Discussion

3393.	Question : Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
Answer» Genetic LOAD Genetic FLOW Genetic drift RANDOM MATING SOLUTION :Genetic drift

Discussion

3394.	Question : Variation in DNAis due to
Answer» Mutation Recombination Both 1 and 2 Neither 1 nor 2 Answer :C

Discussion

3395.	Question : Which cause speciation according to Hugo de vries ?
Answer» RANDOM and directionless small and directional small and directionless random and directional Answer :A

Discussion

3396.	Question :Variant of cellulose and present as a store house of energy in plant tissues, is :-
Answer» GLYCOGEN INULIN STARCH PECTIN ANSWER :A

Discussion

3397.	Question : Variable Number of Tandem Repeats are ………. .base pair long
Answer» 20-30 20-50 20-100 90-100 Answer :C

Discussion

3398.	Question : Variable number of tandem repeats (VTNRs) in the DNA molecule are highly useful in :
Answer» MONOCLONAL ANTIBODY production DNA fingerprinting Recombinant DNA technology Stem CELL culture Answer :B

Discussion

3399.	Question : Van Helmont
Answer» Solution :Supported theory of abiogenesis who CLAIMED that mice were formed from a dirtysweat SOAKED shirt When put in dirty barn in DARK for 21 DAYS.

Discussion

3400.	Question : Van Baer
Answer» SOLUTION :Organisms that show common descent show EMBRYOLOGICAL patterns on which they later build their adutt patterns. This was first OBSERVED by Von Baer.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Mode of vegetative propagation in Pistia.

Question : Vegetative propagated plants :

Question : Vegetative cell of pollen grain

Question : Vegetative propagation is observed in :

Question : Vegetative fertilization is also called (A) triple fusion (B) true fertilization (C) syngamy (D) generative fertilization

Question : Vegetative fertilisation is also called :

Question : vegetation in any area depends on

Question : Vegetaively propagated plants are

Question : Vegetatively propagated plants

Question : Vegetables commercially produced through hydroponics are

Question : Vavilov has given _____ main centres of origin of plants.

Question : Vector for T-DNA is

Question : Vast area of vegetation is destroyed mostly by fires and it results in clearing of lush vegetation. How long it takes to re-form climax community. Name the process is related in the above case.

Question : Vaxillary type of petal arrangemant occurs in

Question : Vasectomy is the surgical cutting of _____.

Question : Vascular tissue in higher plants develop from which of the following :?

Question : Vascular rays are formed by the activity of -

Question :Vascular plants lacking vessels and companion cells are

Question : Vascular grafting during CABG is an example of :-

Question : Vascular cylinder in dicot stems occurs in the form of distinctly separated vascular bundles. But, in some dicot stems, e.g. Linum, Lonicera, it appears to be a continuous cylinder because

Question : Vascular Cambium is essential for :-

Question : Vascular cambium and cork cambium are

Question : vascular cambium cuts off both xylem and phloem on the inner side in

Question : Vascular bundle of monocot is

Question : Vascular and exceretory organs are formed from

Question : Vasa recta is the continuation of

Question : Vasa efferentia - vasa deferens

Question : Vasa efferentia end in and vasa deferentia start from the following regions of epididymis respetively.

Question : Vasa efferentia are the ductules leading from

Question : Vas deferens is about………….long tube.

Question : Various steps involved in mechanism of vision are given below in the form of a flow chart light>photoreceptor cells>A>generate potential difference in photoreceptor cells>B>C>visual cortex in brainCHOOSE THE OPTION WHICH GIVES THE ANSWER FOR A B and C

Question : Various chemical substances inhibit respiration at various steps. Find out the incorrectly matched pair :-

Question : Various stages of succession are given bellow. From that rearrange them accordingly. Find out the type of succession and explain in detail. Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage and marsh medow stage.

Question : Various parts of male urethra are

Question : Variety of species are present around us. What they constitute ? Comment.

Question :Variegated leaf experiment demonstrates that

Question : Variations in gene frequecies withinpopulations can occur by chance ratherthan by natural selection. Thisis referred to as :

Question : Variations during mutations of meiotic recombinations are

Question : Variations caused by mutation, as proposed by Hugo de Vries, are

Question : Give scientific reasons.Variations are expected in sexually reproducing organisms.

Question : Variation is appearing during tissue culture are called_______________.

Question : Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as

Question : Variation in DNAis due to

Question : Which cause speciation according to Hugo de vries ?

Question :Variant of cellulose and present as a store house of energy in plant tissues, is :-

Question : Variable Number of Tandem Repeats are ………. .base pair long

Question : Variable number of tandem repeats (VTNRs) in the DNA molecule are highly useful in :

Question : Van Helmont

Question : Van Baer