CBSE > Class 12 > Biology | CBSE Board | Homework Help

In the dark, due to limited vision, white colour will stand out and the strong fragrance also helps to attract the pollinators. This is why night blooming flowers have relatively more fragrance and is generally white in colour.

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Project on human clonning

Posted by Tarani Balaji 1 year, 11 months ago

CBSE > Class 12 > Biology

1 answers

Sumit Rajput 1 year, 11 months ago

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How PBR322 is used in Biotechnology?

Posted by Janhvi Chopade 1 year, 11 months ago

CBSE > Class 12 > Biology

5 answers

Kumar Savan 1 year, 10 months ago

Used as cloning vector

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Ujjwal Redhu 1 year, 11 months ago

And as many as ori site better will be cloning

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Ujjwal Redhu 1 year, 11 months ago

Because it has 20 ori site

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Account Deleted 1 year, 11 months ago

Desired gene instead of dna ..

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Account Deleted 1 year, 11 months ago

Used as Vector to transfer DNA ..

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Explain the monosphoric development of embryo sac in the ovule of an angiosperm

Posted by Vidya Bista 1 year, 11 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Explain exponential growth

Posted by Lungtan Drema 1 year, 11 months ago

CBSE > Class 12 > Biology

2 answers

Farhat Naaz Naaz 1 year, 8 months ago

Exponential growth: • It is a j-shaped . • Resources are unlimited. • It is represented by dn/dt=rn.

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Arjun Singh 1 year, 10 months ago

Based on reality and the products are limited or there is competition for resources to survive that's why the graph of exponential growth is curved

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Explain the development of mature embryo sac, from the time of formation of megaspore mother cell

Posted by Aayush Sharma 1 year, 11 months ago

CBSE > Class 12 > Biology

2 answers

Masuma Kosar 1 year, 11 months ago

Yes

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Muskan Sharma 1 year, 11 months ago

The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three haploid cells degenerate and one survives to become the embryo sac. The embryo sac enlarges in size and the haploid nucleus undergoes mitosis to form 2 haploid nuclei. The two haploid nuclei further undergo mitosis to form 4 haploid nuclei within the embryo sac. In the final round of mitosis 8 haploid nuclei are produced. Hence, the functional megaspore undergoes 3 mitotic divisions to form eight celled mature embryo sac.

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Explain the role of three organisms as biocontrol agents

Posted by Pradnya Kamble 1 year, 11 months ago

CBSE > Class 12 > Biology

1 answers

Muskan Sharma 1 year, 11 months ago

They cause diseases in the pests or compete with them or kill them.

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ANSWER

Give three reasons as to why the Prokaryotes are not giving any figures for their diversity by the ecologists

Posted by Fiddusur Rahman 1 year, 11 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

What is the ploidy of micropore tetrad ?

Posted by Lahar . 2 years ago

CBSE > Class 12 > Biology

1 answers

Pragya Jakhar 1 year, 11 months ago

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Pooja 's grandmother blames her mother for giving birth to three daughters and wants another marriage of her son. Is it right to blame a female for *** determination? Justify your answer

Posted by Sujitha Reddy 2 years ago

CBSE > Class 12 > Biology

3 answers

Parthi Patel 1 year, 11 months ago

No it is not right to blame a female for *** determination of a child because female's have XX chromosome where on the other hand male's has X and Y chromosome.. Here, If XX chromosome are there it is a girl and if XY chromosome are there then it is a boy.. So a female cannot be blamed for the *** of a child.

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Fiddusur Rahman 1 year, 11 months ago

No female is not responsibility for birth a male or female child because female have only one X hromosome and a male have two chromosome one is X and another one is Y . So when male partner release x chromosome then the child will be female♀️ and when male partner release Y chromosome then the baby will be male♂️ hence females are not responsible to birth a male or female child it's all depends on male partner

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Pranjal Thakur 2 years ago

No , it is not right to blame a female for *** of child . A female has two X chromosome whereas male have both X and Y chromosomes which decide *** of a child . Hence female is not responsible for gender or *** of a child

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ANSWER

Chapter 5 notes

Posted by Megna Patidar 2 years ago

CBSE > Class 12 > Biology

1 answers

Account Deleted 1 year, 11 months ago

Available on this app .….

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Practical copy work

Posted by Rishav Raj 2 years ago

CBSE > Class 12 > Biology

1 answers

Suhasree Bishoyi 1 year, 11 months ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
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Biology investigatory project pdf class 12

Posted by Shevanti Valvi 2 years ago

CBSE > Class 12 > Biology

0 answers

ANSWER

What are angiosperms plant

Posted by Kanishka Thanvi 2 years ago

CBSE > Class 12 > Biology

3 answers

Pradnya Kamble 1 year, 11 months ago

These are higher plants

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Krishna Mishra 2 years ago

Dicotyledon

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Sarika Pandey 2 years ago

Angiosperms means the flowering plant, plant which bear the flower and fruits.

4Thank You

ANSWER

Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc. Write a proper practical file

Posted by Chandrakant Dwivedi 2 years ago

CBSE > Class 12 > Biology

2 answers

Krishna Mishra 2 years ago

720

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Waquar Anis 2 years ago

Curry

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ANSWER

What is the meaning of Rhitins

Posted by Avanya Rao 2 years ago

CBSE > Class 12 > Biology

0 answers

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Listed below are some amino acids and their corresponding mRNA triplets. Phenyl alanine-UUU, Lysine-AAG, Arginine-CGA, Alanine-GCA . Which DNA sequence would be needed to produce the following polypeptide sequence?

Posted by Khushi Puttawar 2 years ago

CBSE > Class 12 > Biology

1 answers

Akib Ahmed 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

1Thank You

ANSWER

Full details about immunity

Posted by Laina Gupta 2 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Komal Gola 2 years ago

Overall ability of the body to fight disease causing pathogen by immune system is called immunity

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ANSWER

Explain predation in detail

Posted by Divya Dave 2 years, 1 month ago

CBSE > Class 12 > Biology

2 answers

Prithvii K 2 years ago

Interaction between two species in which one is called predator and other is prey. e.g, Cat(predator) eats mouse(prey). This happens to maintain the balance of the ecosystem and to survival of the species.

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Khushbu Yadav 2 years, 1 month ago

Gene therapy

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Mention the source organism of the gene cry I ab and its target pest

Posted by Komal Solanki 2 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Mahak Choudhary 1 year, 10 months ago

Source organism is bacillus thuringiensis and its target pest is corn borer( type of beetle).

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ANSWER

Chapter 7 notes

Posted by Ridhima Kapoor 2 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Listed below are all reproductive tract infection except a) genital hepres b) filariasis c) trichomoniasis d) syphilis

Posted by Shivank Dev 2 years, 1 month ago

CBSE > Class 12 > Biology

2 answers

Saksham Garg 2 years, 1 month ago

Filariasis because "Filariasis is a disease caused by a chronic mosquito-borne parasitic infection. Chronic infection can lead to swelling of the extremities, hydroceles, and testicular masses."

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Ashutosh Singh 2 years, 1 month ago

Filariasis

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Reproductive organs

Posted by Adham Khan 2 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Adarsh Jaiswal 2 years, 1 month ago

Male Reproductive organ ***** , Testis , Vas defence Seminal vesical, prostate, Bulbutheral

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how sexual reproduction enables these organisms to survive during unfavorable conditions?Why is sexual reproduction favoured under such conditions?

Posted by Shruti Kumari 2 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

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How many types of RNA polymerase are there in an eukaryotes cell? Mention which one of them transcribes hnRNA

Posted by Muskan Kashyap 2 years, 2 months ago

CBSE > Class 12 > Biology

4 answers

Loknath Chamuah 2 years, 1 month ago

Three types of RAN polymers are there Rna polymers || transcribed hnRna

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Adarsh Jaiswal 2 years, 1 month ago

Three types of RNA polymerase tRNA ,mRNA, rRNA

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Anushka Singh 2 years, 1 month ago

Three different nuclear RNA polymerases are found in eukaryotic cells. RNA polymerase I: It is in charge of generating the majority of ribosomal RNA (rRNA) transcripts. RNA polymerase II: It is responsible for converting protein-coding genes into messenger RNA (mRNA). RNA polymerase III: It is responsible for converting rRNA genes into tiny RNAs such as transfer RNA (tRNA) and 5S rRNA.

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Darshni Darsh 2 years, 1 month ago

What is male axcceory duct

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Code no RSPl/2

Posted by Rahul Surya 2 years, 2 months ago

CBSE > Class 12 > Biology