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    • Posted by Narendra Singh Panwar 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Kuttima Purusothman 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Sinchana Malagond 6 years, 7 months ago

    There are some cases when RH positive blood type is crossed with RH positive blood type we may get RH negative group due to mutations in an individual but this is rare.

    4Thank You

    Sinchana Malagond 6 years, 7 months ago

    No since the recessive gene always expresses in homozygous condition you wont get any Rh- ve blood. You can get this blood group only when either of the parent blood group is homozygous Rh-ve and atleast one of the parent blood group genotype is heerozygous Rh-ve. Make cross and find out.

    3Thank You

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    • Posted by Supriya Tiwari 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 7 answers

    Srishti Choudhary ✍⏳ 6 years, 6 months ago

    Khushi kanchan is rghtt..nothing is easy or hard...

    0Thank You

    K@Łp@N@ $Øđh!?? 6 years, 7 months ago

    Bio is easy

    0Thank You

    Aysha Enami 6 years, 7 months ago

    I think bio.

    0Thank You

    Khushi Kanchan 6 years, 7 months ago

    Well... I am a PCMB student. Maths is not hard if you like it. Maths will help you in other two subjects i.e. physics and chemistry. You need to keeo practicing. Biology is quite interesting but you need to keep revising the things so that you don't forget them. Nothing is hard or easy. It depends completely on your interest. Being a PCMB student, I like both. But I would not suggest you to take both the subjects. Because it will be difficult to manage time... Hope it helped... ^_^

    3Thank You

    Arpita Ghildiyal 6 years, 7 months ago

    Obviously biology bro.....

    1Thank You

    Gursharn Kaur 6 years, 7 months ago

    Bio is much easier

    1Thank You

    Sajid Ali 6 years, 7 months ago

    Biology

    1Thank You

    ANSWER

    • Posted by Rahul Pandey 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Arjita Singh 6 years, 7 months ago

    Single -celed organism are immortal because when they grow up they undergo division i.e., a mother cell divides into two daughter cells. No body part is left to die .so they simply get larger and then divide which is not considered as death .such organism are immortal ......?

    3Thank You

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    • Posted by Namdenibo Makuimai 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Gaurav Seth 6 years, 7 months ago

    In spermatogenesis, cytokinesis results in two equal sized cells. 
     

    Spermatogenesis

    Oogenesis

    It is the process by which sperms are formed from the sperm mother cell in males.

    It is the process by which ovum is formed from the oogonia in females.

    After the second meiotic divisions in a single spermatogonium, 4 spermatids are obtained, which undergo maturation to form 4 sperm cells, or spermatozoa

    After the second meiotic divisions in the single oogonium, only one ovum and three polar bodies are obtained.

    Spermatogenesis occurs in males from puberty  to death.

    In females, oogenesis starts before birth and occurs until menopause.

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    • Posted by Ujjawal Yadav 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Shobikaa Ravikumar 6 years, 7 months ago

    Saliva,mucous of gastrointestinal and respiratory tract, hydrochloric acid of stomach, skin, sebum,etc.

    0Thank You

    Kuttima Purusothman 6 years, 7 months ago

    1.) Fever 2.) pHof the body 3.) Secretions

    1Thank You

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    • Posted by Noorsaba Khan 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Ujjawal Yadav 6 years, 7 months ago

    It is known as vegetative phase in plants. Reproductive phase –the beginning of the reproductive phase can be seen easily in the higher plants when they come to flower. In some plants, where flowering occurs more than once, inter-flowering period is also known as juvenile period.

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    • Posted by Prashant Singh 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Aysha Enami 6 years, 7 months ago

    Bulbil

    0Thank You

    Ujjawal Yadav 6 years, 7 months ago

    Bulbil

    0Thank You

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    • Posted by Noorsaba Khan 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Ujjawal Yadav 6 years, 7 months ago

    Marigold Rice And Wheat Are The Annuals Plant So It Take 3 Months And The Coconut and Mango Take Long Time Approximately 1 years

    0Thank You

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    • Posted by Nitin Ahlawat 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Mayank Aggarwal 6 years, 7 months ago

    Lymphocyte B produces in bone marrow Lymphocyte T produces in bone marrow and transfer to thymus

    1Thank You

    ANSWER

    • Posted by Rahul Yadav 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Ujjawal Yadav 6 years, 7 months ago

    Genes =it is the Functional unit of Inheritance Allels=it Is Actually the Forms Of Genes

    1Thank You

    Janaarrthanan V.K 6 years, 7 months ago

    alleles- two diff contrasting character but gene is protein expression

    2Thank You

    ANSWER

    • Posted by Akash Jangid 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sinchana Malagond 6 years, 7 months ago

    A) XX-XY type in humans. B) ZZ-ZW type in birds. C) XX-XO type in grasshoppers.

    2Thank You

    ANSWER

    xD

    • Posted by Swaggy Harshit 5 years, 8 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Arun Sharma 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Akash Jangid 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Shobikaa Ravikumar 6 years, 7 months ago

    DNA is more stable than RNA and is less reactive (RNA is more reactive due to the presence of an additional OH group in its structure) and further RNA undergoes more mutations in comparison to DNA.

    2Thank You

    ANSWER

    • Posted by Shreya Gupta 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Vysya Company 6 years, 7 months ago

    Pollen grains,nectar,place for the insect to lay eggs

    1Thank You

    ▪▪Amrit▪▪ ❤ 6 years, 7 months ago

    rewards that are given to the pollonators by flower like nectar etc.

    1Thank You

    ANSWER

    • Posted by Shreyanshi Gupta 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Saurabh Parashar 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sinchana Malagond 6 years, 7 months ago

    An individual formed from an egg that buds asexually to form sexually reproducing forms in the members of cniderians.

    1Thank You

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    • Posted by Sinchana Malagond 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    ▪▪Amrit▪▪ ❤ 6 years, 7 months ago

    bcz .in agarose gel pores are created during electrophoresis due to which the fragments of DNAcan be seperated easily . acc. to me this u can also refer to truemen book page no.9 U 4

    3Thank You

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    • Posted by Shobikaa Ravikumar 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Mehak Brar 6 years, 7 months ago

    Allele - 2 alternative forms of a gene Gene - functional unit of heredity(carried from parents to youngones) Chromosome - in meiotic or mitosis divorce chromatins condensed to form chromosome DNA - (polymer) genetic material in most of the organisms Refer to chapter-6

    1Thank You

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    • Posted by Raghav Patidar 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sudarshan Sharma 6 years, 7 months ago

    Anemophilous

    2Thank You

    ANSWER

    • Posted by Rafi Zamir 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Rafi Zamir 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sinchana Malagond 6 years, 7 months ago

    Parthenocarpy is the process of formation of fruits without fertilization and parthenogenesis is the process of formation of an organism without fertilization. Technically, parthenocarpy is used for plants and parthenogenesis for animals.

    5Thank You

    ANSWER

    • Posted by Rafi Zamir 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sinchana Malagond 6 years, 7 months ago

    The pollen grains of vallisneria are prevented from wetting inside the water by the presence of the mucilaginous sheath that cover he pollen grains. Kindly refer NCERT textbook.

    3Thank You

    ANSWER

    • Posted by Harpreet Kaur 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Rishabh Soni 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Rishabh Soni 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Rafi Zamir 6 years, 7 months ago

    Outermost layer of exine

    1Thank You

    Gursharn Kaur 6 years, 7 months ago

    Exine is covered by a yellowish sticky layer. This layer is called pollen kit. It helps in pollination

    1Thank You

    Sudarshan Sharma 6 years, 7 months ago

    It is a sticky lipid rich substance that is released in entmophilous flowers .it is secreted by secretory or parietal tapetum.

    1Thank You

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    • Posted by Deep Gupta 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Rishabh Soni 6 years, 7 months ago

    Neet

    2Thank You

    Deep Gupta 6 years, 7 months ago

    Supplimantry exam date kab haa

    3Thank You

    ANSWER

    • Posted by Ravi Kumar 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Meghna Thapar 5 years, 5 months ago

    The Hershey–Chase experiments were a series of experiments conducted in 1952 by Alfred Hershey and Martha Chase that helped to confirm that DNA is genetic material. ... Hershey and Chase and subsequent discoveries all served to prove that DNA is the hereditary material. In their first experiment bacteria was infected with phages that had radioactive sulfur atoms in their protein molecule and when they separated the proteins from the bacteria, they found no radioactivity on the bacteria. Hershey and Chase concluded that DNA, not protein, was the genetic material. They determined that a protective protein coat was formed around the bacteriophage, but that the internal DNA is what conferred its ability to produce progeny inside a bacterium.

    0Thank You

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    • Posted by Prantik Bhadra 6 years, 7 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Aysha Enami 6 years, 7 months ago

    If male and female reproductive part of plant present together then its called bisexual or monoecious. It is also called homothallic. If male and female reproductive part present different from each other than it is called diecious or unisexual. It is known as heterothallic.

    0Thank You

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