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    • Posted by Krishna ?? 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Kriti Sharma 5 years, 6 months ago

    Microbes play a great role in sewage treatment............................. the first step is.............. primary treatment ...................which involve physical removal of large and small particles from the sewage.................,. through filtration and sedimentation..................... the floating debris is removed by filtration through wire mesh ...............................after this soil and small pebbles by sedimentation is settling thanks .....................this element which settle down is called primary sludge in the supernant form the primary affluent........................... in the primary Affluent is taken to the large aeration tanks with constant mechanical agitation Air Supply ............................why air supply so that aerobic microbes can grow and form flocs .....,.........??

    0Thank You

    Mrutyunjay Khatua 5 years, 6 months ago

    Aerobic microbes

    0Thank You

    ANSWER

    • Posted by Khushi Jaiswal 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Rajput Boy 5 years, 6 months ago

    Glycolysis

    0Thank You

    ANSWER

    • Posted by Rajput Boy 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anshdeep Singh 5 years, 6 months ago

    Holmologus organisam are the example of divergent evolution

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    • Posted by Kunwar Aditya Pratap Singh Yadav 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Rajput Boy 5 years, 6 months ago

    and what about my questions kriti??

    0Thank You

    Kriti Sharma 5 years, 6 months ago

    Oestrus cycle occur in non primates organism .............like sheep........... dogs ...........menstrual cycle occurs in human ...........oestrus cycle does not occur periodically after every month but occurs at the time of mating ana depends on the season...?

    2Thank You

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    • Posted by Kriti Sharma 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 14 answers

    Kriti Sharma 5 years, 6 months ago

    Thanks nishant???

    0Thank You

    Nishant Sharma 5 years, 6 months ago

    BEST OF LUCK?

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    A WOMAN WITH 2 GENES FOR HAEMOPHILIA AND ONE GENE FOR COLOR BLINDNESS ON ONE OF THE X CHROMOSOMES MARRIES A NORMAL MAN. HOW WILL THE PROGENY BE? ??????

    2Thank You

    Nishant Sharma 5 years, 6 months ago

    HOW MANY DOCUMENTED VARITIES OF BASMATI RICE ARE GROWN IN INDIA?????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    ULTRASOUND OF HOW MUCH FREQUENCY IS BEAMED INTO HUMAN BODY FOR SONOGRAPHY? ?????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    DEPLETION OF WHICH GAS IN THE ATMOSPHERE CAN LEAD TO INCREASED INCIDENCE OF SKIN CANCERS?????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    A USEFUL DRUG THAT DAMAGES GASTRIC MUCOSA WHEN TAKEN WITH ALCOHOL!????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    CUSCUTA IS AN EXAMPLE OF? ????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    WHICH TYPE OF PLANT WILL YOU FIND IN THE FECAL MATTER OF T-REX??????

    1Thank You

    Nishant Sharma 5 years, 6 months ago

    CDRI LUCKNOW??

    2Thank You

    Mrutyunjay Khatua 5 years, 6 months ago

    Which organization had devloped 'Saheli' ???

    0Thank You

    Rajput Boy 5 years, 6 months ago

    Kriti??????

    0Thank You

    Rajput Boy 5 years, 6 months ago

    Types of conformers From ch-organism and population

    0Thank You

    Rajput Boy 5 years, 6 months ago

    Define HindIII

    0Thank You

    ANSWER

    • Posted by Neeraj Rautela 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Neeraj Rautela 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Mrutyunjay Khatua 5 years, 6 months ago

    DNTP acts as substrate and provide energy for polymerization..

    1Thank You

    Kriti Sharma 5 years, 6 months ago

    Aug codes for methionine as well as it is a start codon.............?

    1Thank You

    ANSWER

    • Posted by Varun Kumar 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Meghna Thapar 5 years, 6 months ago

    After tubectomy, a female still have your periods and have *** normally. In fact, women may feel more at ease because they do not have to worry about unwanted pregnancy. Tubal ligation is permanent birth control.

    0Thank You

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    • Posted by Diksha Shrivastava 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    sal bacterium bacillus thurenginesis form a cry protein. this cry protein is toxic to larve of certain insects as lepidopteran, cleopteran and dipterans. there are several different types of cry protein. each cry protein is toxic to different grp of insects. B. thurenginesis produces some type of protein crystal in a specific stage of their growth and development.

    1Thank You

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    • Posted by Diksha Shrivastava 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Kriti Sharma 5 years, 6 months ago

    I will suggest you to go and see NCERT exampler for important MCQ?

    0Thank You

    ANSWER

    • Posted by Ritayan Chakrabarti 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Yogita Ingle 5 years, 6 months ago

    Crop variety can be improved by utilizing following methods:

    • Finding a good yield crop
    • Hybridization: The process of interbreeding between geneticallydivergent plants.
    • Introducing a gene to genetically modify the crops by providing desired characteristics to the crops.
    • Good quality seeds must be provided to the farmers.
    • Taking care to prevent the biotic factors(diseases, insects and nematodes) andabiotic factors (drought, salinity, waterlogging, heat, cold and frost) that can affect the crop growth.
    • Shorter maturity of the crops results in more economical variety.
    • Attempts must be taken to ensure higher yield.

     

    0Thank You

    Ritayan Chakrabarti 5 years, 6 months ago

    Isnt it *germplasm collection*?

    0Thank You

    ANSWER

    • Posted by Kriti Sharma 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 15 answers

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    mera aur apka toh dur dur tak ka koi relation nhi hai in fact mai toh janti tak nhi apko toh revenge kesa. revenge toh hum glti karne wale se bhi nhi lete.. toh apse kyu lungi. ?

    1Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    mai kyu revenge lene lagi. maine bus apko correct answer bataya hai kriti .. ???

    0Thank You

    Kriti Sharma 5 years, 6 months ago

    Are you taking a revenge or something darshana idid not liked the way you are saying.

    0Thank You

    Amol Gùpta 5 years, 6 months ago

    Seriously I thought she answered mine ?? ?

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    kuch zyda padh liye apke lagta hai ??

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    madam vntr apka sahi answer maine bola hai first question ka answer wrong hai uska correct answer diya. pehle question smjho ???

    0Thank You

    Amol Gùpta 5 years, 6 months ago

    Nope

    0Thank You

    Kriti Sharma 5 years, 6 months ago

    You are asking probe that is vntr.......... extension and amplication are the processes?

    0Thank You

    Amol Gùpta 5 years, 6 months ago

    Role of ori and restriction site in a cloning vector pBR322???

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    it's extension and amplification.

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    wrong first one is wrong.

    0Thank You

    Kriti Sharma 5 years, 6 months ago

    Ans2 vntr

    0Thank You

    Kriti Sharma 5 years, 6 months ago

    Ans1 annealing of primers and extension of primers?

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    name the probe used by Alec Jeffery while developing the DNA fingerprinting technique.

    1Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    but on some condition avoid Google while answering my question. be alert I will catch you. ⚠. so my first question. During amplification of gene using PCR Taq polymerase is used between___?

    1Thank You

    ANSWER

    • Posted by Divyanshi Pancholi 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Meghna Thapar 5 years, 4 months ago

    Mitosis is a process of cell division, observed in all eukaryotes -organisms with a true nucleus. Binary fission is a process of asexual reproduction carried out by all prokaryotes- organisms without a true nucleus.

    0Thank You

    ANSWER

    • Posted by Rajput Boy 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 4 answers

    Mohan Singh 5 years, 6 months ago

    Kriti apke pass har question ka answer hota hai na. Means app top krne wali ho. And trust me iam not a boy actually i am using my papa's id that's wahy.

    1Thank You

    Arsh Sidhu 5 years, 6 months ago

    Multiple ovulation embryo transfer

    1Thank You

    Kriti Sharma 5 years, 6 months ago

    Hi.............. M O ET ..........multiple ovulation embryo transfer Technology this is very simple as the name suggest ...............multiple ovulation means many eggs and many eggs can be produced very obvious by the application of hormones like fsh.......... so a cow is given hormone fsh to induce folicular naturation then there is a production of 6 to 8 eggs instead of one egg .........now cow is mated with a elite Bull or artificial inseminated........... the fertilized eggs when reach 8 to 32 celled stage are transferred to the surrogate mother .............why surrogate mother because the original cow now becomes ready for one more super ovulation cycle......... again fsh activity ..........again so much of eggs and again mating then comes transferring to the surrogate mother.....????

    1Thank You

    Gaurav Seth 5 years, 6 months ago

    Multiple Ovulation Embryo Transfer Technology (MOET) It is a procedure used in advanced cattle breeding. It involves a superovulation programme in which the donor cow is administered hormones to induce follicular maturation. Instead of one egg, they produce 6-8eggs during a natural heat. The donor cow is artificially inseminated. The fertilised eggs at 8-32 celled stages, are recovered non-surgically and transferred to surrogate mothers. This technology is used to increase the herd size in a short time.

    2Thank You

    ANSWER

    • Posted by Bhumi Ahuja 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Ankita Khatri 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Gaurav Seth 5 years, 6 months ago

    Parthenocarpy is the natural or artificially induced production of fruit without fertilization of ovules, which makes the fruit seedless. Stenospermocarpy may also produce apparently seedless fruit, but the seeds are actually aborted while they are still small. Parthenocarpy (or stenospermocarpy) occasionally occurs as a mutation in nature; if it affects every flower the plant can no longer sexually reproduce but might be able to propagate by apomixis or by vegetative means. In some plants, pollination or another stimulation is required for parthenocarpy, termed stimulative parthenocarpy. Plants that do not require pollination or other stimulation to produce parthenocarpic fruit have vegetative parthenocarpy. Seedless cucumbers are an example of vegetative parthenocarpy, seedless watermelon is an example of stenospermocarpy.So  these fruits are formed without fertilization'.

    1Thank You

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    • Posted by Meghna Sharma 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Kriti Sharma 5 years, 6 months ago

    Previous year questions of biology .......................are very well available at your extra books .........................you can go for NCERT exampler ....................which provides a great source of questions ....................and Google www.learncbse.com ..................Biology important question ................you will get all the previous year questions if you want to seek help from YouTube search by biotonic vedantu.........???

    0Thank You

    Sanchari Roy 5 years, 6 months ago

    In "my cbse guide".

    2Thank You

    ANSWER

    • Posted by Bhumi Ahuja 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Kriti Sharma 5 years, 6 months ago

    Pollens are exploited by humans ...................... as pollen grains are great sources of energy and so they in the form of tablets are exploited by humans.................. mainly sports players which requires a lot of energy ..............storage of Pollen grains in Pollen banks by taking advantage of that hard layer exine which is made up of sporopollenin........... which preserves it for longer period of time............ so that their viability is not lost and can be used future..........??????

    0Thank You

    Riya Rana 5 years, 6 months ago

    Bcoz now they are used for other purposes by humans such as using them as food suplements since they have high nutritive value. It is confirmed by them that taking pollen tablets show an increase in the sports performance. Humans have also created pollen banks where pollens are stored by cryopreservation in -196℃ in liquid nitrogen so that they do not lose there viability in less time and can be used in coming future.

    2Thank You

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    • Posted by Harkaranbir Singh 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Kriti Sharma 5 years, 6 months ago

    PCR.................. polymerase Chain Reaction................. basically in this we just want to create many DNA copies ok................ so first step that we are doing is ..................denaturation.......... that is we are separating both the strands of DNA by the application of high temperature.................. now we cannot just put all the primers in one go................. and make new DNA .................primers are added slowly in small small amount ...........that process is called annealing.................. then they become a long chain of nucleotides...................... DNA is not prepared in one go we need to put some primers Anneal them .....................and they will undergo polymerization to form complete dna strand...........???

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    • Annealing is the process of pairing of primers with complimentary base sequences of the two separated strands.
    • Primers are single strand sequences of DNA or RNA around 20 to 30 bases in length.
    • They serve as the starting point for the synthesis of DNA.

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    • Posted by Sanchari Roy 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Mohan Singh 5 years, 6 months ago

    Homologous chromosomes pair during meiosis and only one member of each pai finds its way into given germ cell . Mendelian factors segragte from one cell to an other in similar fashion⚔️?️⚔️????

    2Thank You

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    • Posted by Rajput Boy 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    ? ? 5 years, 6 months ago

    Because nearly all complex life forms are bilaterally symmetrical, with major body parts paired on the left and right sides of the body. It is difficult for a bilaterally symmetrical organism to evolve to have an odd number of legs...i.e. three legs

    1Thank You

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    • Posted by Aman Kumar 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Arsh Sidhu 5 years, 6 months ago

    Freidrich meisher

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    DNA was first recognised and identified by the Swiss biologist, Johannes Friedrich Miescher in 1869 during his research on white blood cells.

    The double helix structure of a DNA molecule was later discovered through the experimental data by James Watson and Francis Crick. Finally, it was proved that DNA is responsible for storing the genetic information of a human being.

    1Thank You

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    • Posted by Harkaranbir Singh 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 4 answers

    Kriti Sharma 5 years, 6 months ago

    Restriction enzymes ........................are basically molecular scissors ......................which cut the DNA.... ..................but they are of two types.................. the endonuclease and exo nuclease............. and endo nuclease basically cut the DNA by recognising specific palindrome sites.............. in between the DNA ................the first restriction endonuclease that was discovered was hind 2..........????

    0Thank You

    Arsh Sidhu 5 years, 6 months ago

    Hind2

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    • Restriction enzymes belong to a larger class of enzymes called Restriction enzymes are called as molecular scissors because these enzymes cut DNA at specific sites.
    • The first restriction endonuclease is Hind II.
    • The restriction enzymes cut DNA at specific base sequence, and these specific base sequence is known as the recognition sequence.

    1Thank You

    Mrutyunjay Khatua 5 years, 6 months ago

    Hind 2

    1Thank You

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    • Posted by Harkaranbir Singh 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    ? ? 5 years, 6 months ago

    It prevents self ligation of vector DNA

    1Thank You

    Harkaranbir Singh 5 years, 6 months ago

    Sry its alkaline phosphatase(AP)

    0Thank You

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    • Posted by Daksh Jain 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 5 years, 6 months ago

    Sedimentary cycles have their reservoirs in the Earth’s crust or rocks. Nutrient elements are found in the sediments of the Earth. Elements such as sulphur, phosphorus, potassium, and calcium have sedimentary cycles.

    Sedimentary cycles are very slow. They take a long time to complete their circulation and are considered as less perfect cycles. This is because during recycling, nutrient elements may get locked in the reservoir pool, thereby taking a very long time to come out and continue circulation. Thus, it usually goes out of circulation for a long time.

    1Thank You

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    • Posted by Om Yadav 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 5 answers

    Divyanshi Pancholi 5 years, 6 months ago

    Mera bhi

    0Thank You

    Arsh Sidhu 5 years, 6 months ago

    Mine

    0Thank You

    Yash Kerkar 5 years, 6 months ago

    Mera

    0Thank You

    Varsha Tripathy 5 years, 6 months ago

    Mera

    0Thank You

    Ďãřşháñăã Yadav ? ? ? 5 years, 6 months ago

    Mera

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    • Posted by Muskaan Vig 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    ? ? 5 years, 6 months ago

    ?

    0Thank You

    Muskaan Vig 5 years, 6 months ago

    Thank you so much.

    0Thank You

    ? ? 5 years, 6 months ago

    Plasmids are circular ds DNA which have the ability to self replicate .....they are not necessary for survival but provides certain phenotypic properties .....plasmids have ori which allows them to replicate themselves without intervetion of chromosomal DNA....thus plasmid replicates autonomously...

    3Thank You

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    • Posted by Neeraj Rautela 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Kriti Sharma 5 years, 6 months ago

    There can be many causes of infertility in human couples ....................it can be ..............genital .............psychological ...........physiological ...............in males it can be low sperm count..................... poor quality of sperms................. in females uterus might not be able to provide required environment.... and eggs maybe of poor quality........????

    1Thank You

    Nandini Singh 5 years, 6 months ago

    Infertility may also be due to inability of male partner to inseminate the female or due to very low sperm count in the ejaculates

    1Thank You

    Gaurav Seth 5 years, 6 months ago

    When a couple is unable to produce children in spite of unprotected sexual cohabitation, it is a case of infertility. Infertility can be due to many reasons; like physical, congenital, diseases, drugs, immunological or even psychological.

    1Thank You

    ANSWER

    • Posted by Neeraj Rautela 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Gaurav Seth 5 years, 6 months ago

    Apomixis is the asexual production of seeds so that apomictic seeds are clones of the mother plant. The production of viable seeds without pollination or fertilization is called apomixis. These seeds are produced from flowers, just as regular seeds, but no pollen is involved. For example, Mangosteen produces apomictic seeds within the fruit. Even dandelion produces many apomictic seeds. An advantage of apomixis is that it would drastically reduce the cost of hybrid production, so that plant breeders produce new varieties of seeds more quickly and more cheaply. A disadvantage of apomictic seeds is that it reduces genetic diversity from parent to offspring plants due to lack of variations in asexual reproduction.

    2Thank You

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    • Posted by Harini Anubaratham 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

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