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

The ligase is a bacteria of biochemistry, a ligase is an enzyme that can catalyze the joining of two molecules by forming a new chemical bond. This is typically via hydrolysis of a small pendant chemical group on one of the molecules, typically resulting in the formation of new C-O, C-S, or C-N bonds.

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Write a short note on implantation of blastocyst

Posted by Khali Jindal 2 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Mansi Nautiyal 2 years, 2 months ago

The blastocyst stays in their uterus for several days before it implants in the inner lining of their uterine wall (endometrium). It continues to make new cells, which separate into layers. About 10 to 12 days after fertilization, the blastocyst develops into an embryo.

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Why is reproduction essential for organism ?

Posted by Ronny Singh 2 years, 2 months ago

CBSE > Class 12 > Biology

3 answers

Rohit Kumar 2 years ago

To mentain their species on the earth

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Punit Yaduvanshi 2 years, 2 months ago

To continue their species in next generation on earth

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Krishna Achu 2 years, 2 months ago

To continue their species on earth so that they doesn't get extinct

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Mineral nutrition important

Posted by Rakhi Yuvnati 2 years, 2 months ago

CBSE > Class 12 > Biology

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Draw a labelled diagram of pollen grain tetrad

Posted by Tanvi Sharma 2 years, 2 months ago

CBSE > Class 12 > Biology

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How many ch are there?

Posted by Aniket Singh 2 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Saffron Samari 2 years, 2 months ago

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What is the scientific name of frog

Posted by Simran Khanduri 2 years, 2 months ago

CBSE > Class 12 > Biology

2 answers

Mansi Nautiyal 2 years, 2 months ago

Rana tigrina

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Oceen Chauhan 2 years, 2 months ago

Rana tigrina

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What are ART's. Explain

Posted by Vaishu Ram 2 years, 2 months ago

CBSE > Class 12 > Biology

3 answers

Punit Yaduvanshi 2 years, 2 months ago

Artificial technology

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Pawan Singh Gour 2 years, 2 months ago

Spermetogenesis

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Pawan Singh Gour 2 years, 2 months ago

Can you explain the IUT technology in chater 3

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Write about Hershey and chase experiment

Posted by Sathana Mp 2 years, 2 months ago

CBSE > Class 12 > Biology

2 answers

Hitesh Raj Yadav 2 years, 1 month ago

Hershey and chase = they infected E.coli with bacteriophage and used radioactive sulphur ,radioactive phosphorus and the step were infection, blending, centrifugation and As the DNA contain phosphorus and protein contain sulphur. So at last after all steps they got DNA contained phosphorus, which shows that the DNA is transferred not protein.

Hence it was unequivocal proof that DNA is the genetic material.

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Devesh Pratap Singh 2 years, 2 months ago

Harshey and chase experiment about- Unequivocal proof of genetic material come from work of harshey and chase

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Can i get the pdf of biology lab manual laxmi publicationpdf class 12

Posted by Tanu Kaushik 2 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Account Deleted 2 years, 2 months ago

You can check on Google.

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How vallisneria adapt pollination

Posted by Gayathri Ramaiyan 2 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Tanu Kaushik 2 years, 2 months ago

Pollens pollinate on water surface But cannot regard as water pollination

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Spermatogenesis

Posted by Menka Goswami 2 years, 3 months ago

CBSE > Class 12 > Biology

5 answers

Devesh Pratap Singh 2 years, 2 months ago

Formation of sperm is known as spermatogenesis

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Oceen Chauhan 2 years, 2 months ago

The process by which sperm is form

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Pawan Singh Gour 2 years, 2 months ago

Hey listen Khushi Rai. Can you help me in study

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Pawan Singh Gour 2 years, 2 months ago

Spermetogenesis

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Khushi Rai 2 years, 3 months ago

The process by which formation of sperm .

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Monohybrid cross of dominant allel

Posted by Mokshika Sharma 2 years, 3 months ago

CBSE > Class 12 > Biology

1 answers

Rohit Kumar 2 years ago

Hey mokshika ,can you help in study

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How to solve pedigree?

Posted by Sapana Gupata 2 years, 3 months ago

CBSE > Class 12 > Biology

2 answers

Punit Yaduvanshi 2 years, 2 months ago

¹Dominant/Recessive,²Autosomal/Sexlink³Genotype ratio

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Khushi Gupta 2 years, 3 months ago

Solving pedigree analysis in 3 steps~ 1~ look for mitochondrial inheritance. 2~ look if the gene is dominant, recessive. 3~ look if the disease is x- linked or autosomal Or Y- linked.

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Why are stimulants and hallucinogens categorised as psychotropic drugs give example f each of two types mentioned

Posted by Shayaz Basha Parveen 2 years, 3 months ago

CBSE > Class 12 > Biology

1 answers

Shayaz Basha Parveen 2 years, 3 months ago

Both increased activity of brain and change thought and perception . stimulants:cocaine , hallucinogens: charas

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Can you sand me biology ch 8 short notes?

Posted by Afsha Be 2 years, 3 months ago

CBSE > Class 12 > Biology

2 answers

Afsha Be 2 years, 2 months ago

Thank you

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Account Deleted 2 years, 3 months ago

Available in this app ..

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Project on pollen grain development

Posted by S3D .. 2 years, 3 months ago

CBSE > Class 12 > Biology

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Principle of inheritance and variation notes

Posted by Adipti Garg 2 years, 3 months ago

CBSE > Class 12 > Biology

2 answers

Khushi Gupta 2 years, 3 months ago

Available in this app

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Arushi ⋆♡ 2 years, 3 months ago

I have

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Which part of anther secrets sporopollenin ?

Posted by Vishnu Gujjar 2 years, 3 months ago

CBSE > Class 12 > Biology

4 answers

Punit Yaduvanshi 2 years, 2 months ago

Exine

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Sneha Mamodia 2 years, 3 months ago

Exine layer of pollen grain

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Aisha Negi 2 years, 3 months ago

inner cell.

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Amit Don 2 years, 3 months ago

Exine

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Microbes in human welfare project

Posted by Sapto Shan 2 years, 3 months ago

CBSE > Class 12 > Biology

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Drug Addiction and Adolescence project pdf

Posted by Avi Upadhayay 2 years, 3 months ago

CBSE > Class 12 > Biology

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Give a detail notes on male reproductive parts in the plants

Posted by Arvind Rajpurohit 2 years, 3 months ago

CBSE > Class 12 > Biology

1 answers

Account Deleted 2 years, 2 months ago

Angiosperms Have Androecium as their Male reproductive part Androecium consists of two parts Anther and Filament Angiosperms are flowering plants Gymnosperms have Microsporangia And In Very detail about Male reproductive part of plants u can get it in Class 11th NCERT Chapter Plant Kingdom

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Give reasons rotifers are called parthenocarpic organisms

Posted by Chaudhary Daksh 2 years, 3 months ago

CBSE > Class 12 > Biology

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What is the differentiate between the plugging and labelling

Posted by Sheetal Pal 2 years, 3 months ago

CBSE > Class 12 > Biology

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What are differences between male and female reproductive system

Posted by Shivani Jha 2 years, 3 months ago

CBSE > Class 12 > Biology

1 answers

Abhishek Kumar Singh 2 years, 3 months ago

The male reproductive system includes the testes (which produce sperm), *****, epididymis, vas deferens, ejaculatory ducts and urethra. The female reproductive system consists of the ovaries (which produce eggs or oocytes), fallopian tubes, uterus, cervix, ****** and vulva.

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Write the various functions of nucleus in a cell

Posted by Sheetal Pal 2 years, 3 months ago

CBSE > Class 12 > Biology

1 answers

Anjan Karthi 2 years, 3 months ago

1) Stores genetic material (Chromatin). 2) Ribosomal RNA synthesis (Nucleolus). 3) Controls central functions of the cell. 4) Plays central role in cell division mechanisms (Chromatin). 5) Ribosome production.

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Why are stmulants and hallucinations categories as psy chotopic drugs ? Give examples of each of two types mentioned

Posted by Payal Bagaria 2 years, 3 months ago

CBSE > Class 12 > Biology