24277 + Interview Questions in Biology in Class 12 Page 205 InterviewSolution

10201.	Question : Point out the female accessory organs.
Answer» SOLUTION : FALLOPIAN TUBES, UTERUS and VAGINA.

Discussion

10202.	Question : Point out the factors that determine success rate of tissue culturing.
Answer» Solution :The success of tissue CULTURE LIES in the composition of the growth medium, PLANT growth REGULATORS and culture conditions such as temperature, pH, LIGHT and humidity.

Discussion

10203.	Question : Point out the factors that determine the binding force betwee antigen-antibody reactions.
Answer» Solution :The BINDING FORCE between antigen and antibody is due to three factors.They are CLOSENESS between antigen and antibody ,noncovalent BONDS or intermolecular FORCES and affinity of antibody.

Discussion

10204.	Question : Point out the factors that alters allelic frequency of a population.
Answer» SOLUTION :Natural SELECTION, GENETIC DRIFT, Mutation and Geneflow

Discussion

10205.	Question : Name the extra embryonic membranes.
Answer» SOLUTION :(a) AMNION (b) Chorion (c) allantois (d) YOLK NAC

Discussion

10206.	Question : Point out the exceptional categories to universality of genetic code.
Answer» SOLUTION :Exceptions to universal NATURE of genetic code is noticed in prokaryotic mitochondrial and CHLOROPLAST GENOMES.

Discussion

10207.	Question : Point out the epochs of carboniferous period.
Answer» SOLUTION :(a) PENNSYLVANIAN (B) MISSISSIPPIAN

Discussion

10208.	Question : List any two effects of noise pollution.
Answer» Solution :• According to the USEPA (United States Environmental PROTECTION Agency) there are direct links between noise and health. Heart disease, high blood pressure, stress relate illness, sleep disruption, hearing loss (deafness), and productivity loss are the problems related to noise pollution. • Increased stress and tension, NERVOUSNESS, irritability, anxiety, depression and panic ATTACKS. • PEPTIC ulcer, severe head ache and memory loss. • MARINE animals are affected by noise pollution from offshore activities and port activities. • Fire crackers frighten animals. Birds are often affected by increased air traffic.

Discussion

10209.	Question : Point out the differences between anemophilous flowes and ornithophilous flowers.
Answer» SOLUTION :

Discussion

10210.	Question : Point out the differences between active and passive immunity .
Answer» SOLUTION :

Discussion

10211.	Question : Name a biosphere reserve in Tamil Nadu __.
Answer» SOLUTION :(a) Nilgiris (TAMIL Nadu - Kerala) (b) Agasthya MALAI (Tamil Nadu - Kerala - Karnataka) (c) Gulf of MANNAR (Tamil Nadu)

Discussion

10212.	Question : Point out the basic principles of Darwin's theory of evolution
Answer» Solution :Over PRODUCTION, struggle for EXISTENCE, Universal OCCURENCE of VARIATION, Survival of fittest and NATURAL selection.

Discussion

10213.	Question : Point out the Anatomical adaptations exhibited by the Halophytes.
Answer» Solution :Anatomical adaptations: Epidermal cells of STEM is heavily cutinized, ALMOST squarish and are filled with oil and tannins. tar. shaped SCLEREIDS and H. shaped heavy thickened SPICULES that provide mechanical Strength to cortex are present in the stem. he leaves may be dorsiventral or isobilateral with salt secreting glands.

Discussion

10214.	Question : Point out the applications of plant tissue culture. Plant tissue culture techniques have several applications such as:
Answer» Solution :Plant tissue CULTURE techniques have several applications such as: i. Improved hybrids production through somatic hybridization. ii. Somatic embryoids can be encapsulated into synthetic seeds (synseeds). These encapsulated seeds or synthetic seeds help in conservation of plant biodiversity. iii. Production of disease resistant plants through meristem and shoot tip culture. iv. Production of stress resistant plants like herbicide tolerant, heat tolerant plants. v. Micropropagation technique to OBTAIN large numbers of plantlets of both crop and tree species useful in FORESTRY within a short span of TIME and all through the year. vi. Production of secondary metabolites from cell culture utilized in pharmaceutical, cosmetic and food INDUSTRIES.

Discussion

10215.	Question : Write the advantages of natural vegetative reproduction.
Answer» Solution :(a) Only one parent is REQUIRED (b) NEW individuals are genetically similar (c) RAPID SPREADING (d) Large SCALE production.

Discussion

10216.	Question : Point out the adverse effect caused by invasive species
Answer» Solution :INVASIVE species are fast growing and are more adapted. They alter the SOIL system by changing litter quality THEREBY affecting thesoil community, soil fauna and the ECOSYSTEM processes. It has a NEGATIVE impact on decomposition in the soils by causing strees to the neighbouringnative species

Discussion

10217.	Question : Point out the adaptive traits of aquatic animals .
Answer» Solution :1. The pectoral fins and dorsal fins act as stabilizers or balancers and the CAUDAL fins help in changing the DIRECTION as a rudder. 2. Arrangement of body muscles in the form of bundles (myotomes) help in locomotion. 3. Stream in structure helps in the swift movement of the animals in water. 4. Respiration by gills making USE of gases dissolved in water. 5. Presence of air-bladders filled with air for buoyancy. 6. Presence of lateral-line SYSTEM. They function as rheoreceptors which is helpful in echolocating objects in water. 7. Integuments rich in mucous glands are protected by scales. 8. Maintain water and ionic balance in its body with excretory structures.

Discussion

10218.	Question : Enumerate the applications of single-cell protein .
Answer» Solution :Applications of single - Cell Protein : `` It is used as protein supplement. `` It is used in cosmetics , products for healthy hair and SKIN. `` It is used in poultry as the excellent source of proteins and other nutrients , it is widely used for feeding cattle . birds as fishes etc. `` it is used in food industry as aroms carriers ,emulsifying agents to improve the nutritive value of baked products , in soupsin ready - to SERVE - MEALS , in diet recipes. `**` It is used in industries like paper processing and LEATHER processing as FOAM stabilizers.

Discussion

10219.	Question : Point out any two non-point sources of water pollution.
Answer» Solution :a) AGRICULTURE chemical RUN off. B) DUMPING of plastics in WATER bodies.

Discussion

10220.	Question : Point out any two morphological adaptations noticed in the roots of hydrophytes.
Answer» SOLUTION :ROOTS are TOTALLY absent in Wolfia and SALVINIA or poorly developed in Hydrilla or well developed in Ranunculus. he root caps are replaced by root POCKETS. Example: Eichhornia.

Discussion

10221.	Question : Write the advantages and disadvantages of Bt cotton.
Answer» Solution :Bt cotton has some limitations : `` COST of Bt cotton SEED is high. `` EFFECTIVENESS up to 120 DAYS after that effleiency is reduced.

Discussion

10222.	Question :Point out any two microbes that play crucial role in recombinant DNA technology.
Answer» SOLUTION :a) Saccharomyces cerevisiae (b) ESCHERICHIA COLI

Discussion

10223.	Question : Point out any three mangrove ecosystem services.
Answer» Solution : ACT as bridge between sea and RIVERS by balancing sedimentation and soil erosion. Help to reduce water force during cyclones, tsunamis and high TIDE periods. Help in WIND break, `O_2` production, carbon sequestration and prevents salt SPRAY from waves.

Discussion

10224.	Question : Point out any three importance of variations.
Answer» Solution :`` They HELP the individuals to ADAPT themselves to the changing environment . `` Variations ALLOW breeders to IMPROVE better yield ,quicker growth , increased resistance and lesser input. `**`They constitute the RAW materials for evolution.

Discussion

10225.	Question : Point out any three salient features of chromosomal theory of inheritance.
Answer» Solution :Salient features of the CHROMOSOMAL theory chrosomal theory of inheritance. Somatic CELLS of ORGANISMS are derived from the zygote by REPEATED cell division (mitosis). These consist of chromosomes. One set is received from female parent (maternal) and consist of two identical sets of chromosomes. One set is received from parent (maternal) and the other from male (parent ) . These two chromosomes constitute the HOMOLOGOUS pair. Chromosomes retain their structural uniquencess and individuality throughout the life cycle of an organism.

Discussion

10226.	Question : Point out any six modes of asexual reproduction seen in animals.
Answer» SOLUTION :(i) fission (ii) budding (iii) fragmentation (iv) SPORULATION (iv) regeneration (VI) GEMMULE formation.

Discussion

10227.	Question : Point out any four peripheral lymphoid organs.
Answer» SOLUTION :LYMPH nodes,spleen,TONSILS,MALT.

Discussion

10228.	Question : Point out any four condition under which Hardy Weinberg's equilibriumn is not 2. attained.
Answer» SOLUTION :Selected mating Flow of genes EITHER by IMMIGRATION or emmigration ) Occurance of mutation Definite POPULATION size.

Discussion

10229.	Question : Point out any four STD's caused by viruses.
Answer» Solution :1. Genital HERPES 2. Hepatitis -B 3. Genital warts 4. AIDS

Discussion

10230.	Question : Point out any four physical mutagens.
Answer» SOLUTION :Temperature , X - RAYS , GAMMA rays and UV rays.

Discussion

10231.	Question : Point out any 5 functional attributions of biodiversity.
Answer» Solution :The major functional attributes are: • continuity of nutrient cycles or biogeochemical cycles `(N_(2) C_(2)H_(2)O_(2) P, S `cycles) • SOIL FORMATION, conditioning or maintenance of soil health (fertility) by soil microbial diversity along with the different trophic members • increases ecosystem productivity and provide food resources • act as water traps, filters, water FLOW regulators and water purifiers (FOREST cover and vegetation) • climate stability (forests are essential for rainfall, temperature regulation, `CO_(2)` absorption, which in turn regulate the density and type of vegetation) • forest resource management and sustainable development

Discussion

10232.	Question : Point of difference beteen artery and vein excludes
Answer» Nature of MUSCLE in tunica media Diameter of LUMEN of blood vessels Presence and absence of valves Thickness of tunica media Answer :A

Discussion

10233.	Question : Point of attachment ofchromatids of a chromosome
Answer» SOLUTION :CHROMOMERES

Discussion

10234.	Question : Point mutation involves
Answer» insertion change in SINGLE BASE pair duplication deletion Answer :B

Discussion

10235.	Question : Pods of entada gigas differ from other leguminous pod at the tme of atuochorous seed dispersal as they
Answer» open buy two valves TWIST spirally open with a LOUD NOISE thow out their SEEDS Answer :C

Discussion

10236.	Question : Point any four ways by which IPR is protected in India.
Answer» Solution :Patents, Copyrights, TRADE secrets and GEOGRAPHICAL INDICATIONS.

Discussion

10237.	Question : Podocytes are found in glomerulus.
Answer» True False Answer :BOWMAN's CAPSULES

Discussion

10238.	Question : podocytes are
Answer» epithelial CELLS and bowman's capsule modified SMOOTH MUSCLES fibres of DCT modified smooth muscles fibres of PCT epithelial cells ANSWER :A

Discussion

10239.	Question : Podocytes are cells present in:
Answer» OUTER WALL BOWMAN's capsule Neck of nephron Inner lining of Bowman's capsule Wall of GLOMERULAR capillary Answer :C

Discussion

10240.	Question : Poaching of tiger is a burning issue in today's world. What implication would this activity have on the functioning of the ecosystem of which the tigers are an integral part ?
Answer» Solution :In food chain tiger plays is very important role and HELPS in maintaining stability of ecosystem. Being carnivore it KEEP CHECK over uncontrolled GROWTH of herbivores. It removes sick and old animals from population. It plays a lead role as INDICATOR of health of jungle.

Discussion

10241.	Question : Pneumotaxic centre is associated with
Answer» BREATHING EXCRETION digestion sleeping ANSWER :A

Discussion

10242.	Question : Pneumonia is spreading by ..............
Answer» WATER and food COUGHING and SPUTUM SNEEZING and coughing All the above Solution :Coughing and sputum

Discussion

10243.	Question :Pneumatophores take part in :
Answer» EXCRETION FEEDING RESPIRATION Reproduction Answer :C

Discussion

10244.	Question : Pneumatophores occur in :
Answer» Epiphytes Hydropytes Xerophytes Mangrove plants Answer :D

Discussion

10245.	Question : Pneumatophores help
Answer» To GET `CO_(2)` for photosynthesis To get `O_(2)` for photosynthesis To get `CO_(2)` for respiration To get `O_(2)` for respiration Answer :D

Discussion

10246.	Question : Pneumatophores are found in
Answer» FICUS benghalensis Maize Sugarcane Rhizophora Answer :D

Discussion

10247.	Question : Pneumatophores are present/common in:
Answer» xerophytes hygrophytes mesophytes halophytes Answer :D

Discussion

10248.	Question : PMNL stands for
Answer» Polymorpho NUCLEAR LEUCOCYTES Polymer Nuclear Leucocytes Polymorphic Nuclear Leucocytes Polymorpho Nuclear LYMPHOCYTE SOLUTION :Polymorpho Nuclear leucocytes

Discussion

10249.	Question : Pneumatophers are characteristic features of
Answer» Halophytes Xerophytes Hydrophytes Thalophytes Answer :A

Discussion

10250.	Question : Plotting of specific gnes on the chormosome is know as
Answer» CHROMOSOME MAP WOOLLY hair Brachydactyly curly HAIRS Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : Point out the female accessory organs.

Question : Point out the factors that determine success rate of tissue culturing.

Question : Point out the factors that determine the binding force betwee antigen-antibody reactions.

Question : Point out the factors that alters allelic frequency of a population.

Question : Name the extra embryonic membranes.

Question : Point out the exceptional categories to universality of genetic code.

Question : Point out the epochs of carboniferous period.

Question : List any two effects of noise pollution.

Question : Point out the differences between anemophilous flowes and ornithophilous flowers.

Question : Point out the differences between active and passive immunity .

Question : Name a biosphere reserve in Tamil Nadu __.

Question : Point out the basic principles of Darwin's theory of evolution

Question : Point out the Anatomical adaptations exhibited by the Halophytes.

Question : Point out the applications of plant tissue culture. Plant tissue culture techniques have several applications such as:

Question : Write the advantages of natural vegetative reproduction.

Question : Point out the adverse effect caused by invasive species

Question : Point out the adaptive traits of aquatic animals .

Question : Enumerate the applications of single-cell protein .

Question : Point out any two non-point sources of water pollution.

Question : Point out any two morphological adaptations noticed in the roots of hydrophytes.

Question : Write the advantages and disadvantages of Bt cotton.

Question :Point out any two microbes that play crucial role in recombinant DNA technology.

Question : Point out any three mangrove ecosystem services.

Question : Point out any three importance of variations.

Question : Point out any three salient features of chromosomal theory of inheritance.

Question : Point out any six modes of asexual reproduction seen in animals.

Question : Point out any four peripheral lymphoid organs.

Question : Point out any four condition under which Hardy Weinberg's equilibriumn is not 2. attained.

Question : Point out any four STD's caused by viruses.

Question : Point out any four physical mutagens.

Question : Point out any 5 functional attributions of biodiversity.

Question : Point of difference beteen artery and vein excludes

Question : Point of attachment ofchromatids of a chromosome

Question : Point mutation involves

Question : Pods of entada gigas differ from other leguminous pod at the tme of atuochorous seed dispersal as they

Question : Point any four ways by which IPR is protected in India.

Question : Podocytes are found in glomerulus.

Question : podocytes are

Question : Podocytes are cells present in:

Question : Poaching of tiger is a burning issue in today's world. What implication would this activity have on the functioning of the ecosystem of which the tigers are an integral part ?

Question : Pneumotaxic centre is associated with

Question : Pneumonia is spreading by ..............

Question :Pneumatophores take part in :

Question : Pneumatophores occur in :

Question : Pneumatophores help

Question : Pneumatophores are found in

Question : Pneumatophores are present/common in:

Question : PMNL stands for

Question : Pneumatophers are characteristic features of

Question : Plotting of specific gnes on the chormosome is know as