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    • Posted by Khilendra Sahu 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Muskan Saini 4 years, 4 months ago

    ?

    2Thank You

    Black Panther 4 years, 4 months ago

    Severe acute respiratory syndrome and an infectious disease that lead to respiratory problems. It is a retro virus having its own rna genome means it is a group of virus due to which many symptoms appear in patient like symptoms of pneumonia, common cold etc.. Full name- SARS COV-ID (19). MAY BE IT WOULD HELPFUL TO YOU...

    1Thank You

    Anuradha Patwari 4 years, 4 months ago

    it's a Virus Family sars

    0Thank You

    ANSWER

    • Posted by Sandra Babu 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Nidhi Bharti 4 years, 4 months ago

    Yes, there are two methods as explained in NCERT. 1. Diploid egg cell is produced in apomictic plants and with no need of fertilization they perform parthenogenesis and form embryo. 2. Many of nucellus cells divides and protrude in the unfertilized embryo sac leading to the formation of multiple embryo in the embryo sac.

    1Thank You

    ANSWER

    • Posted by Akankshya Mishra 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    I G 4 years, 4 months ago

    It is a type of cell division by which parent cell divides to form daughter cells having half number of chromosomes of parent cell

    2Thank You

    Vihar L 4 years, 4 months ago

    Reductional division

    0Thank You

    ANSWER

    • Posted by Vicky Seal 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Nidhi Bharti 4 years, 4 months ago

    Cleistogamy is the property of a flower in which a flower never opens and Anther and stigma remains close to each other. Advantage: they provide assured pollination Disadvantage: continuous self pollination causes inbreading depression.

    6Thank You

    ANSWER

    • Posted by Vibha Gautam 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Aditya Singh 4 years, 4 months ago

    Parthenogenesis

    0Thank You

    Anshika Tripathi 4 years, 4 months ago

    Parthenogenisis

    0Thank You

    Harpreet Singh 4 years, 4 months ago

    Parthenogenesis

    0Thank You

    ANSWER

    • Posted by Shubham Sharma 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Utkarsh A 4 years, 4 months ago

    Yes that's all depend on father's genes if from father x came then girl will come and if y will come from father then it will be son.

    1Thank You

    Nidhi Bharti 4 years, 4 months ago

    Yes because this depends on which type of sperm i.e. X carrying or Y carrying fuses with the egg

    3Thank You

    Anuradha Patwari 4 years, 4 months ago

    Yes

    2Thank You

    ANSWER

    • Posted by Rajat Kumar 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Vishal Singh 4 years, 3 months ago

    Polyembryony mean occurrence of more than one embryos in seed eg-groundnut and citrus (oranges??)

    0Thank You

    Black Panther 4 years, 4 months ago

    When one or more than one embryo are present in one seed. Eg- orange and adventive embryoni comes under poly embryony..

    0Thank You

    Rohitansh Singh 4 years, 4 months ago

    Polyembryony, a condition in which two or more embryos develop from a single fertilized egg, forming what in humans is known as identical twins. A common phenomenon in many plant and animal species, polyembryony occurs regularly in the nine-banded armadillo, which usually gives birth to four identical young.

    2Thank You

    ANSWER

    • Posted by Honey Thakur 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sia ? 4 years, 4 months ago

    Oogenesis is the differentiation of the ovum into a cell competent to further develop when fertilized. It is developed from the primary oocyte by maturation. Oogenesis is initiated in the embryonic stage.

    1Thank You

    ANSWER

    • Posted by Shrutimayee Meher 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    H Sowmya. 4 years, 4 months ago

    An organism can't reproduce in two ways both sexual and asexual.( But in algae it can reproduce sexually under some conditions.)

    1Thank You

    ANSWER

    • Posted by Disha Soni 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Sia ? 4 years, 4 months ago

    a bundle of nerve fibres enclosed in a sheath of connective tissue, or forming one of the main tracts of white matter in the spinal cord.

    0Thank You

    Disha Soni 4 years, 4 months ago

    The stalk of the ovule is called funiculus.

    0Thank You

    ANSWER

    • Posted by Kirti Sharma 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Nidhi Bharti 4 years, 4 months ago

    Genotype can be found out with the help of test cross. In which the voilet coloured flower whose genotype is to be find is crossed with a recessive white flower. If all the progeny obtained are violet then the genotype is homogenous dominant but if half progeny are white and half are violet then the genotype is heterogenous

    3Thank You

    ANSWER

    • Posted by Kirti Sharma? 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 4 answers

    Shubham Sharma 4 years, 4 months ago

    95

    0Thank You

    Rishita Bisht 4 years, 4 months ago

    95

    5Thank You

    Anuradha Patwari 4 years, 4 months ago

    95

    5Thank You

    Sia ? 4 years, 4 months ago

    So, total meiotic division required is 375.

    4Thank You

    ANSWER

    • Posted by Cap Jack Sparrow 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Sia ? 4 years, 4 months ago

    So, after 80 minutes there will be 4 generations. In the first generation all the strands will be hybrid (as the heavy isotope will be incorporated in the newly synthesised strand of DNA) i.e the two DNA will be of intermediate nature. In the second generation, 50% the DNA will be light and 50% will be hybrid.

    0Thank You

    Nidhi Bharti 4 years, 4 months ago

    In 80 min, DNA will replicate 4 times. so, 16 dna copies will be formed out of which, 2 are hybrid i.e. 12.5% is Hybrid DNA and 14 dna copies are light dna so 87.5% is light DNA

    1Thank You

    ANSWER

    • Posted by Rishita Bisht 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sia ? 4 years, 4 months ago

    An anticodon is a unit of three nucleotides corresponding to the three bases of an mRNA codon. Each tRNA has a distinct anticodon triplet sequence that can form 3 complementary base pairs to one or more codons for an amino acid. Some anticodons pair with more than one codon due to wobble base pairing.

    0Thank You

    ANSWER

    • Posted by Pritha Garach? 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Anshika Tripathi 4 years, 4 months ago

    1 Trueman , Pradeep 2 Sl Arora 3 Op Tandon , Pradeep's

    1Thank You

    Anuradha Patwari 4 years, 4 months ago

    Oswall sample paper

    1Thank You

    Pooja Barik 4 years, 4 months ago

    Arihant

    3Thank You

    ANSWER

    • Posted by Rachita T 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sia ? 4 years, 4 months ago

    Hamel was the teacher in faithful service for forty years. He wore his Sunday clothes in honor of his last French class. The old villagers were present on the last day at school. Hamel told Franz that the Prussians would find fault with the French for they do not know to read and write French.

    0Thank You

    ANSWER

    • Posted by Rishita Bisht 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 4 answers

    Aahana ❄❄ 4 years, 4 months ago

    ●Prolactin or mammotrophin hormone or Lactogenic , regulate the growth of the mammary glands and formation of milk in them ●Oxytocin is milk ejecting hormone ?

    0Thank You

    Nidhi Bharti 4 years, 4 months ago

    Prolactin is responsible for milk production and oxytocin is responsible for milk ejection

    1Thank You

    Anuradha Patwari 4 years, 4 months ago

    Prolactin

    0Thank You

    Omii Rajput.... ? 4 years, 4 months ago

    The two primary hormones that are needed for lactation are prolactin and oxytocin. Prolactin stimulates milk biosynthesis within the alveolar cells of the breast and oxytocin stimulates contraction of the myoepithelial cells that surround the alveoli, causing the milk to be ejected

    2Thank You

    ANSWER

    • Posted by Prithviraj Jangu Bishnoi 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sia ? 4 years, 4 months ago

    Stamen and pistil are the main parts of flowers seen in male and female flowers respectively. Corn is a pistillate flower. Pistillate flowers are those that don't have stamens. The tassels of corn cob represents the female part of the flower which is style and stigma.

    1Thank You

    ANSWER

    • Posted by Aditi Bains 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Sarika Sharma 4 years, 4 months ago

    It is a type of back cross in which F1 generation cross with homozygous reccesive genotype

    0Thank You

    Rishita Bisht 4 years, 4 months ago

    If a cross is done between F1 hybrid organism and the homozygous recessive individual

    1Thank You

    Anuradha Patwari 4 years, 4 months ago

    Use to find the % or the genotypic in f2 generation

    1Thank You

    ANSWER

    • Posted by Rishita Bisht 4 years, 4 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Anuradha Patwari 4 years, 4 months ago

    Haploid

    1Thank You

    Mayank Verma 4 years, 4 months ago

    (a) 2n, 2n, 2n, n

    2Thank You

    ANSWER

    • Posted by Pranjal Chaursiya 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Nidhi Bharti 4 years, 5 months ago

    Mainly 3 hormones work together to perform spermatogenesis, these are: LH, FSH and androgens like testosterone. LH works on Interstitial cells to produce androgens. Androgens in turn induce the process of spermatogenesis. FSH acts on sertoli cells so as to provide nutrition to to spermatozoa formed.

    3Thank You

    ANSWER

    • Posted by Rajneesh Khandelwal 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Bishal Jyoti Baishya 4 years, 5 months ago

    Mechanism 1. Denauration 2. Anneling 3 . Extension Refer to Unacademy Ritu mam #shorts for PCR.

    0Thank You

    Devil ? 4 years, 5 months ago

    Used to obtain the million copies of desired dna fragment

    0Thank You

    ANSWER

    • Posted by Poleboina Rishitha 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Rohitansh Singh 4 years, 4 months ago

    Internodes are the distances between the two nodes and do not have meristematic cells so cannot give rise to a new plant. Internodes cannot give rise to adventitious buds. Thus, internodal segments of sugar cane fail to propagate vegetatively even when they are in contact with damp soil

    1Thank You

    ANSWER

    • Posted by Sh G 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Nidhi Bharti 4 years, 5 months ago

    Chargaff rule states that in a double helix DNA structure based on complementary base pairing, the ratio of bases are such that: the ratio of Adenine to Thymine and Guanine to Cytosine is constant and equals to one. It can be applied by putting the ratios as stated above and place them equals to one, and from there the quantity of one base can be found out if the quantity of other base of the ratio is known.

    2Thank You

    Bishal Jyoti Baishya 4 years, 5 months ago

    Chargaff rule and application - Complementary base pairing between (adenine and thymine via double bonds ) and ( guanine and cytosine via triple bonds ) with the help of hydrogen bonding Between the bases.

    1Thank You

    Devil ? 4 years, 5 months ago

    the ratio of adenine to thymine is equal, as is the ratio of cytosine to guanine .

    0Thank You

    ANSWER

    • Posted by Hritik Rajput 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Aahana ❄❄ 4 years, 4 months ago

    Read ncert book carefully ??

    0Thank You

    # Bharat 4 years, 5 months ago

    Present in pelvic region A pair of testes ******* epididymis contains 3 part VAS deference A pair of Seminal vesicle ,at the back of urinary bladder Prostate gland (single) Bulborethral gland Urethra ***** ..........

    0Thank You

    Nancy Singh 4 years, 5 months ago

    Location of male reproductive system - pelvis region . It includes a pair of 1. Pair of testes 2. Accessory ducts 3. Glands 4. External genitalia (*****)

    1Thank You

    ANSWER

    • Posted by Witendonliu Abonmai 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 5 answers

    Anuradha Patwari 4 years, 4 months ago

    Absolutely True

    1Thank You

    Prabha Netam 4 years, 5 months ago

    Hii

    0Thank You

    Devil ? 4 years, 5 months ago

    Yea its true .. in case of serios injury . Or ectopic pregnancy .

    0Thank You

    Nancy Singh 4 years, 5 months ago

    It's true because it occurs only around 10-15% cases

    0Thank You

    Hritik Rajput 4 years, 5 months ago

    True

    3Thank You

    ANSWER

    • Posted by Shivam Agrawal 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 3 answers

    Sarika Sharma 4 years, 4 months ago

    9 :3:3:1

    0Thank You

    Devil ? 4 years, 5 months ago

    D) 1 :1

    0Thank You

    Hey Kriti 4 years, 5 months ago

    9:3:3:1

    0Thank You

    ANSWER

    • Posted by Partik Nehra 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Aditi Bains 4 years, 4 months ago

    Due to involuntary contractions of diaphragm

    0Thank You

    ANSWER

    • Posted by Neil Modi 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Pragati Jadav 4 years, 5 months ago

    Sexual mode of reproduction include two parents. The major event's are as follows

    0Thank You

    ANSWER

    • Posted by Neil Modi 4 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

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