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    • Posted by Sweety Sweety 7 years ago

    CBSE > Class 12 > Biology
    • 0 answers
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    • Posted by Divanshi Bhardwaj 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Cool Kumar 7 years ago

    A single gene contain many phenotipic expression

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    • Posted by Divanshi Bhardwaj 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Surabhi Tiwari 7 years ago

    It is the peculiarity of the haplodiploid *** determination system . In this system the male develop from unfertilised egg and are haploid, and female develop from fertilised egg and are diploid. So, the male honeybee was created from an unfertilised egg of the queen bee, so it has a mother only and no father. However sperm was used to create its mother, so the male honeybee hs a grandfather, and if the male honeybee sperm is used to create the next queen , then the unfertilised eggs that she lays will become his grandsons.

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    • Posted by Sadaf Fathima 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Navya Singh 7 years ago

    Because bt cotton contain becillilus threungenesis which when reach in gut of insect gets proper ph nd kill insect

    0Thank You

    Kushal Kusha 7 years ago

    Yes of course

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    • Posted by Shivangi Pandey 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Brahmjot Kaur 7 years ago

    Liver , Fingertips and Endometrium

    1Thank You

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    • Posted by Shama Shama Sheikh 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Arti Vishwakarma 7 years ago

    All topics are important

    4Thank You

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    • Posted by Pinky Verma 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Medical Termination of Pregnancy (MTP) is a legalized method of termination of pregnancy, intentionally, before its full term. It is also known as induced abortion or intentional or voluntary termination of pregnancy. As per the records, in a year around 50 million MTPs take place all over the world. Many misinterpret MTP as a birth control method. Thus, it is misused.Though it counteracts the uncontrollable population, it is not meant for controlling population.
    Medical Termination of Pregnancy (MTP) Act, 1971 is an effort of the Indian government to get rid of unwanted pregnancy legally without any misuse. This act mainly focuses on unwanted pregnancies and is applicable to all women with certain terms and conditions.

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    • Posted by Gaurav Pandey 7 years ago

    CBSE > Class 12 > Biology
    • 0 answers
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    • Posted by Malkeet Kaur 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Garima Bansal 7 years ago

    Postmortem

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    • Posted by Akash Singh 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Annuals: Annuals, as its name, completes their life cycle within a single season. They grow, bear fruit and die off in one season. Generally, a plant like herbs exhibits this type of life cycle. Examples are Mustard, rice, etc.
    Perennials: Perennials are vegetation having a life cycle of more than two seasons. Once they grow and start to produce fruits, they continue this cycle for a long period of time.  They do not die after bearing fruit; they renew their parts, season after season. All trees belong to this category. Example, Mango, coconut trees, etc.

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    • Posted by Aditya Bhatt 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Saumya Agrawal 7 years ago

    It form the embryo And after that these cells get diffrentiated into geminal layers which form major organs in adults...

    2Thank You

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    • Posted by Yogesh Kumar 7 years ago

    CBSE > Class 12 > Biology
    • 3 answers

    Garima Bansal 7 years ago

    Ampullary-isthmic junction

    0Thank You

    Saumya Agrawal 7 years ago

    In isthmus ampullary junction...

    2Thank You

    Vinayak Sharma 7 years ago

    In amphulla region

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    • Posted by Anna Vthankachan 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Priyanka Singh 7 years ago

    Nucleoid is a region in procakyotic organisms where DNA is held within the proteins in large loops. Nucleosome is a structural unit of chromatin where a histone octamer {made of 8 histone molecules ( negatively charged proteins) } contains the DNA in a rounded fashion.

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    • Posted by Rudraksh Kukreti 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Minamata disease was first discovered in Minamata city in Kumamoto prefecture, Japan, in 1956. It was caused by the release of methylmercury in the industrial wastewater from the Chisso Corporation's chemical factory, which continued from 1932 to 1968. This highly toxic chemical bioaccumulated in shellfish and fish in Minamata Bay and the Shiranui Sea, which, when eaten by the local population , resulted in mercury poisoning. While cat, dog, pig, and human deaths continued for 36 years, the government and company did little to prevent the pollution.

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    • Posted by ????? ???? 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Saumya Agrawal 7 years ago

    Use arihant sample paper or all in one

    1Thank You

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    • Posted by Vivek Pandey 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Saumya Agrawal 7 years ago

    Administration of progestrogens or progestogen-estrogen combinations or IUDs within 72 hours...

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    • Posted by Ajay Kurmi 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Shubhangi Singh 7 years ago

    Some hydra, like Hydra circumcincta and Hydra viridissima, are hermaphrodites, and may produce both testes and an ovary at the same time. So hydra can reproduce sexually also.

    0Thank You

    Saumya Agrawal 7 years ago

    Budding

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    • Posted by Agam Opa 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Divanshi Bhardwaj 7 years ago

    Parthenogenesis- development of an egg (ovum) into a complete individual without fertilization by a sperm is know as. Parthenogenesis is it of two types Natural and, Artificial Parthenocarpy -(Gk. Virgin, karos- fruit) is the formation of fruit without fertilization and pollination.

    1Thank You

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    • Posted by Suraj Kumar Verma 7 years ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Shefali Bharti 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Samir Mughal??????️? 7 years ago

    Yup!!

    0Thank You

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    • Posted by Nidhi Mishra 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Yogita Ingle 7 years ago

    Enzymes such as restriction enzymes have to recognize a very specific sequence in order to carry out its task. It binds to the DNA only in one specific configuration. Luckily! because you don't want a 'pacman' that cuts DNA at random places.

    DNA is double stranded, so it has 'two sides' to which the enzyme can bind. A palindromic sequence is the same backwards and forwards on both sides (see image below). This means that the enzyme recognizes the sequence no matter from which side the enzyme approaches the DNA.

    A palindromic sequence also increases the chance that both strands of DNA are cut. It is even possible that two enzymes work as a dimer to cut the palindromic sequence, further increasing efficiency.

    The last reason has been important in the struggle between viruses and bacteria. Bacteria have evolved to 'disable' bacteria-targeting viruses (bacteriophages) using restriction enzymes that bind to these palindromic sequences. Cutting both strands of DNA harms the virus more than cutting one strand.

     

    2Thank You

    Saumya Agrawal 7 years ago

    Palindromic sequence is their recognition site when they detect them they start their work of cutting dna and making sticky dna .. Bcoz its their way of working

    0Thank You

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    • Posted by Vidya Sinha 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Saumya Agrawal 7 years ago

    CRY is the protein and cry is the gene which carry that protein...

    5Thank You

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    • Posted by Ritik Sharma 7 years ago

    CBSE > Class 12 > Biology
    • 0 answers
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    • Posted by Saptarshi Sarkar 5 years, 8 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Montreal protocol  is an international treaty that has been put in place to protect the Ozone layer by reducing the production of those substances that cause ozone depletion. According to this protocol, the level of production of CFC's should not exceed 150% of the calculated level of production in 1986.
    Montreal Protocol is an international treaty that was signed at Montreal (Canada) in 1987 to control the emission of ozone depleting substances. It came into effect in the year 1989. It was designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for its depletion. According to the treaty the use, production and emission of Chloroflorocarbons(CFCs) was decreased . The CFCs were replaced by Hydroflorocarbons( HFCs) which proved to be less harmful to the ozone and atmosphere.

    1Thank You

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    • Posted by Amit Patel 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Paramjeet Baliyaan 7 years ago

    A lady could become pregnant by undergiong intra cytollasmic sperm injections and artificial insemination or she may also opt for IVF

    1Thank You

    Amit Patel 7 years ago

    This question was asked in my school

    1Thank You

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    • Posted by Zuba Khan 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Paramjeet Baliyaan 7 years ago

    Divergent evolution is defined as the evolution in which organisms have same structure of the organs but those structures perform different functions according to the need of different organisms.

    0Thank You

    Rudraksh Kukreti 7 years ago

    When due to the different needs ,some structure devlop differently , condition called divergent

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    • Posted by Nikita Singh 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Vinegar is the product made from the conversion of ethyl alcohol to acetic acid by a genus of bacteria, Acetobacter. Therefore, vinegar can be produced from any alcoholic material from alcohol-water mixtures to various fruit wines (Peppler and Beaman 1967).

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    • Posted by Rudraksh Kukreti 7 years ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years ago

    Acrosome is a cap-like structure present in the anterior part of the head of the sperm. It contains the enzyme hyaluronidase, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.

    2Thank You

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    • Posted by Kapil Kumawat 7 years ago

    CBSE > Class 12 > Biology
    • 3 answers

    Paramjeet Baliyaan 7 years ago

    Intime which is composed of cellulose and pectin , hence it is very elastic and flexible.

    0Thank You

    Nikita Singh 7 years ago

    Intine which is formed of cellulose

    1Thank You

    Rudraksh Kukreti 7 years ago

    Intine,,

    1Thank You

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    • Posted by Guru Parmar 7 years ago

    CBSE > Class 12 > Biology
    • 2 answers

    Shaima Ameen 7 years ago

    u can also read ncert dat will clear all ur doubts

    0Thank You

    Shaima Ameen 7 years ago

    in prokaryotes the gene expression is regulated by a protein.this is a structure where structural gene is found known as operon.lac operon is normally in off mode and it comes in on mode in presence of lactose

    0Thank You

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