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1751.

Question : What is the accessory pancreatic duct called?

Answer»


ANSWER :DUCT of SANTORINI
Discussion
1752.

Question : What is the abnormality , where the inguinal canal fails to contract or reopens called ?

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ANSWER :INGUINAL HERNIA
Discussion
1753.

Question : What is tetrad?

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Solution :(i) Each homologous chromosome of a bivalent begin to form two identical sister chromatids, which remain held TOGETHER by a CENTROMERE.
(ii) At this stage each bivalent chromatids.
(iii) This stage is called TETRAD stage has four
(iv) It OCCURS during pachytene of meiotic prophase I.
Discussion
1754.

Question : What is test cross ? Write its significance.

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Solution :It is a KIND of BACK cross where FI plant is crossed with its recessive parent.
It HELPS in FINDING `F_(1)` Plant is homozygous or heterozygous.
Discussion
1755.

Question :What is test cross? Mention its significance.

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Solution :It is a cross between an INDIVIDUAL of unknown DOMINANT genotype is CROSSED with the recessive parent to find out the homozygosity or HETEROZYGOSITY. To PREDICT he genotype of the test/unknown organism.
Discussion
1756.

Question : What is test cross ?

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Solution :Test CROSS :A cross between individual with unknown gentype for a PARTICULAR trai with a reessive plant for that TRAIT .
Discussion
1757.

Question : What is test cross ? Why it is done ?

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Solution :Test CROSS is CROSSING an individual of unknown GENOTYPE with a homozygeous recessive. It is used to IDENTIFY whether an individual is homozygous or HETEROZYGOUS for dominant character.
Discussion
1758.

Question : What is terminalisation?

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Solution :After crossing over, chiasma starts to move TOWARDS the terminal end of CHROMATIDS. This is known as terminalisation. As a result, complete separation of homologous chromosomes OCCURS. It occurs in mieotic prophase I.
Discussion
1759.

Question : What is Taung Baby ?

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FOSSILIZED SKULL cap of a CHILD of Australopithecus
The skeleton of a child from Tanzania
The female fossil of Java man
The young ONE of Proconsul

Answer :A
Discussion
1760.

Question : What is TATA box?

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Solution :In eukaryotes, the promoter has AT rich REGIONS called TATA BOX or Goldberg-Hogness box It acts as a BINDING site for RNA POLYMERASE.
Discussion
1761.

Question : What is synteny?

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SOLUTION :The TWO genes that are sufficiently FAR apart on the same CHROMOSOME are called unlinked genes or syntenic genes. Such condition is known as synteny.
Discussion
1762.

Question : What is synapsis or syndesis?

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Solution :Intimate PAIRING between two homologous chromosomes occurs during zygotene STAGE of prophase I of meiosis. They are aligned side by side RESULTING in a pair of homologous chromosomes called BIVALENTS. This pairing phenomenon is called SYNAPSIS or syndesis.
Discussion
1763.

Question : What is stroke volume ?

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Solution :During lone cardian CYCLE, each ventricle pumps out approximately 70 ML. of blood. This is CALLED the STROKE volume.
Discussion
1764.

Question : What is zymology ?

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Solution :ZYMOLOGY deals with biochemical PROCESS of FERMENTATION and its APPLICATION.
Oenology daels with STUDY of wine and making.
Discussion
1765.

Question : What is stomium ?

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Solution : (i) In a ANTHER, celld along the junction of the TWO sporangia of an anther lobe lack the ENDOTHECIUM and thickenings.
(ii) This REGION is called STOMIUM and helps in dehiscence of anther at maturity.
Discussion
1766.

Question : What is stock?

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Solution :A PLANT rooted in the soil on which the SCION is INSERTED for grafting is CALLED stock.
Discussion
1767.

Question : What is statement?

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Part between two H-lines
Part between two A-lines
Part between two I-bonds
Part between two Z-lines

Solution :HUXLEY REPORTED the fine structure fo strated musclen fibre or MYOFIBRIL. Each myofibril is make up of A-bands (dark band anisotropic) and I-bands= isotropic (light bands isotropic). These two bands are made up of myosin and actin filament respectively. Each I-band is divided into two equal HALVES by a thin, fibrous and transverse zig-zag PARTITION, called Z-band or Z-disc or Krause's membrane.
The part of the myofibril between two successive Z-lines founctions as a contractile unit called sarcomere.
Discussion
1768.

Question : What is standing crop?

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Solution :Each trophic level has a CERTAIN MASS of living MATERIAL at a particular time called as the standing CROP.
Discussion
1769.

Question : What is sporophytic budding ?

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Solution :In adventive embryony an EMBRYO ARISES directly from the diploid sporophytic CELLS either from nucellus or integument. It is ALSO called sporophytic budding because gametophytic PHASE is completely absent. Adventive embryos are found in Citrus and Mangifera.
Discussion
1770.

Question : What is sporopollenin?

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Solution :(i) It is a SUBSTANCE present is exine of pollen grain and contributed by both pollen cytoplasm and tapetum. It is derived from carotenoids.
(ii) It helps to WITHSTAND temperature and is RESISTANT to strong acid, alkali and ENZYME action.
(iii) It preserves the pollen for long periods in fossil deposits, and it also protects pollen during its JOURNEY from anther to stigma.
Discussion
1771.

Question : What is spermiogenesis?

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SOLUTION :FORMATION of SPERM from SPERMATIDS in the TESTES
Discussion
1772.

Question : What is spermatogenesis? Explain the process of spermatogenesis.

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SOLUTION :It is the PROCESS of formation of spermatozoa (sperms) in the testis from the immature male germ cells (Spermatogonia)
The spermatogonia within the SEMINIFEROUS TUBULE multiply by mitotic division and increase in numbers. Each spermatogonium is diploid and contains 46 chromosomes.
Some of the spermatogonia called primary spermatocytes undergo first meiosis leading to the formation of two equal, haploid cells called SECONDARY spermatocytes, with 23 chromosomes each.
The secondary spermatocytes undergo second meiotic division to produce four equal, haploid spermatids.
The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis
Sperm heads become embedded in the sertoli cells, and are finally released from the seminiferous tubules by the process called spermiation.
Discussion
1773.

Question : What is spermatogenesis? Briefly describe the process of spermatogenesis.

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SOLUTION :The process of FORMATION of SPERM is known as SPERMATOGENESIS. The process of spermatogenesis includes the formation of SPERMATIDS and spermiogenesis.
Discussion
1774.

Question : What is species richness ? Give example.

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Solution :The NUMBER of species PER unit area at a specific time is called species richness, which denotes the MEASURE of species diversity. E.g., Western ghats have more AMPHIBIAN species than Eastern ghats.
Discussion
1775.

Question : What is source of marijuana?

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SOLUTION :CHOPPED STEM and LEAVES CANNABIS sativa.
Discussion
1776.

Question : What is somatic hybridization?

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Solution :Somatic HYBRIDISATION is the process of fusing protoplasts of a mature CELL DERIVED from TWO different varieties or species of plants in a suitable nutrient culturę MEDIUM.
Discussion
1777.

Question : What is somatic hybridisation?

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SOLUTION :It is a SPECIAL type of HYBRIDISATION in which the fusion of protoplasts of SOMATIC cells takes place in a suitable nutrient medium to develop somatic HYBRID.
Discussion
1778.

Question : What is somatic embryogenesis? Give any two of its applications.

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SOLUTION :SOMATIC EMBRYOGENESIS is the formation of embryos from the callus tissue directly and these embryos are CALLED Embryoids.
Applications:
Somatic embryogenesis provdies potential plantlets which after hardening period can establish into plants.
Somatic embryoids can be used for the production of synthetic seeds.
Discussion
1779.

Question : What is somaclonal variation?

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Solution :Genetic VARIATION found AMONG the PLANT cells in a culture
Discussion
1780.

Question : What is soil texture?

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SOLUTION :Particles of different size in the SOIL FORM soil texture
Discussion
1781.

Question : What is soil profile?

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SOLUTION :The PHYSICAL FEATURE ofsoil
Discussion
1782.

Question : What is soil permeabillity ?

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SOLUTION :The characteristic of soil that determines the movement of water through pore SPACES is known as soil PERMEABILITY. Soil permeability is directly dependent on the pore SIZE. Water holding capacity of the soil is INVERSELY dependent on soil porosity.
Discussion
1783.

Question : What is so special about tropics that might account for their greater biological diversity ?

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SOLUTION :(a) Speciation is a function of time, unlike TEMPERATE REGIONS subejcted to FREQUENT glaciations in the past, tropical LATITUDE have remained relatively undisturbed for milion of years and thus had long evolutionary time for species diversification.
(b) Tropical environment are less seasonal, more constant and prodicatable.
(c) More solar energy available in the tropics contributing to high productivity leading to greater diversity.
Discussion
1784.

Question : What is snow-blindness ?

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Glaucoma
Lethal effect of UV-rays in eyes
Inflammation of CORNEA DUE to HIGH dose of UV
Inflammation of THROAT. 

Answer :C
Discussion
1785.

Question : What is smog? Who coined this term?

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Solution :SMOG is smoke and FOG together. Smog is CAUSED due to man-made air pollution in urban areas. The word smog was coined by DR. H.A. DesVoeux who was an active organizer of BRITISH smoke abatement societies.
Discussion
1786.

Question : What is SMOG and how it is harmful for us?

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Solution :SMOG is a type of air pollution caused by tiny particles in the air. The word comes from a mixture of the words SMOKE and fog. Today, smog generally refers to photochemical smog, which is created when sunlight reacts with nitrogen oxides and VOLATILE organic compounds found in fossil fuel emissions from automobiles, factories, and power plants. These reactions create ground-level ozone and particulate matter, reducing visibility. Smog can make breathing more difficult, especially for PEOPLE with asthma. Smog also AFFECTS plants and animals. It damages crops as well as causes health problems in pets, farm animals and human beings. Smog has also been known to cause corrosive damage to buildings and vehicles.
Discussion
1787.

Question : What is skiny covering on the glans penis called ?

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ANSWER :PREPUCE
Discussion
1788.

Question : What is Sinus arrhythmias ?

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SOLUTION :During INSPIRATION the heart RATE increases while at the time of expiration the heart rate DECREASES. This phenomenon is known as sinus arrhythmias.
Discussion
1789.

Question : What is sinus arrhythmia?

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SOLUTION :During inspiration HEART RATE increases and during EXPIRATION it falls-this causes variations from NORMAL rhythm of heart which is known as sinus arrhythmia.
Discussion
1790.

Question : What is Single Cell Protein? Or SCP?

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SOLUTION :It is a MICROBIAL biomass which is used as FOOD or FEED.
Discussion
1791.

Question : What is silvopasture system? How it helps economy?

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Solution :The production of woody plants COMBINED with pasture is referred to silvopasture system. The trees and SHRUBS may be USED primarily to produce fodder for LIVESTOCK or they may be grown for timber, fuel wood and fruit or to IMPROVE the soil.
Discussion
1792.

Question : What is significance of crossing over?

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Solution :(i) Exchange of segments LEADS to new gene combinations which plays an important role in evolution.
(II) Studies of crossing over reveal that genes
(III) are arranged linearly on the chromosomes. Genetic maps are made based on the frequency of crossing over.
(iv) Crossing over helps to understand the
(v) nature and mechanism of gene action. If a useful new combination is formed it can be used in PLANT BREEDING.
Discussion
1793.

Question : What is significance of amniotic fluid ?

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PREVENTS DESSICATION and helps in body MOVEMENTS of foetus
Provides nutrition
Helps in GASEOUS exchange
Helps in excretion

Answer :A
Discussion
1794.

Question : What is Sharbati sonora?

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Solution :Sharbati SONORA is a mutant VARIETY of wheat, which is DEVELOPED from Mexican variety (Sonora 64) by irradiating of gamma rays. It is the work of DR. M.S. Swaminathan who is known as 'Father of Indian green revolution'.
Discussion
1795.

Question :What is sex linked inheritance? Give an example.

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Solution :Sex linked inheritance is the inheritance of somatic characters due to the genes present on sex CHROMOSOMES (X and Y chromosomes) or allosomes. EXAMPLE - colour blindness, Haemophilia and HYPERTRICHOSIS in MAN.
Discussion
1796.

Question : What is sewage? In which way can sewage be harmful to us?

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Solution :The wastewater CONTAINING large amounts of organic matter and microbes is called sewage. The sewage contains many harmful pathogens.it will pollute the natural water bodies like RIVERS and streams if it is released into them. This will in turn cause the spreading of many COMMUNICABLE diseases which are transmitted through contaminated FOOD and water.
Discussion
1797.

Question : What is sewage ? In which way can sewage be harmful to us?

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Solution : Large QUANTITIES of waste water are generated everyday in cities and towns. A major component of this water is human excreta. This municipal waste water is also called sewage. It CONTAINS large amounts of organic matter and MICROBES. MANY of which are PATHOGENIC.
Discussion
1798.

Question : What is sewage ? From what sewage water is passed before disposing?

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Solution : Large quantities of waste water are generated everyday in CITIES and towns. A major component of this waste water is human excreta. This municipal waste water is also called sewage. It contains large amount of organic matter and microbes. MANY of which are pathogenic. This urban waste water cannot be discharged into natural water bodies like rivers and streams directly. Sewage is treated in sewage TREATMENT plants (STPs) to make it less polluting. Treatment of waste water is done by the heterotrophic microbes NATURALLY present in the sewage.
Discussion
1799.

Question : What is serology?

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Solution :A branch of immunology which deals with the STUDY of antigen-antibody INTERACTIONS is called SEROLOGY.
Discussion
1800.

Question : What is serum ?

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BLOOD WITHOUT the blood corpuscles
Blood without the plasma
Blood without the CLOTTING factors
Plasma without the clotting factors

Answer :D
Discussion