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

Cu T is an intrauterine device or contraceptive having ionized copper.The cu diffuses into the uterus and brings about the release of toxic cytokines.They inhibit the sperm motility and therefore the fertilization of ovum.

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Name the muscular and glandular layer of human uterus .Which one of these layer undergoed cyclic changer during menstrual cycle.Name the hormone essential for the maintenance of the layer.

Posted by Imran Saifi 8 years, 2 months ago

CBSE > Class 12 > Biology

2 answers

Divya Sen 8 years, 2 months ago

The ans which bhumi has given is correct and the hormone essential is progesterone

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Bhumi Jain 8 years, 2 months ago

Mascular layer is myometrium Glandular layer is endometrium Endometrium undergoes cyclic changes

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What are monocarpic and polycarpic plants?

Posted by Shivani Shivani 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Divya Sen 8 years, 2 months ago

Monocarpic plants are the one which flowers ony once in thier lifetime while the polycarpic plants flowers many times throughout their life.

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What is polyembryony?

Posted by Shivani Shivani 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Divya Sen 8 years, 2 months ago

Polyembrony is the phenomenon of formation of more than one embryo during the development of seed.

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What is neoteny?

Posted by Shivani Shivani 8 years, 2 months ago

CBSE > Class 12 > Biology

4 answers

Divya Sen 8 years, 2 months ago

I think it means that in this the organism in adult phase also shows the juvenile phase and physical maturity is not achieved properly.

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Divya Sen 8 years, 2 months ago

Well i m also little bit confused about it actually..

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Divya Sen 8 years, 2 months ago

We can say that it is a process in which the physiological development of an organism slows or delays.

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Divya Sen 8 years, 2 months ago

Neoteny is the process of retention of juvenile features and the adulthood maturity of an animal.

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Sir,from where i can get all india set of last year question papers

Posted by Yash Tiwari 8 years, 2 months ago

CBSE > Class 12 > Biology

0 answers

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difference between tapetum & scutellum

Posted by Trishala Vijaywargiya 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Iveleen Mal 8 years, 2 months ago

Tapetum: specialised layer of cells, which provides nutrition for growing spores. Scutellum: modified seed leaf

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Whai is flux

Posted by Mukesh Sah 8 years, 2 months ago

CBSE > Class 12 > Biology

0 answers

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What is the reason of early maturity of blind children then normal ones?

Posted by Ashutosh Kr Shah 8 years, 2 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

What is saheli

Posted by Nganloi Noklang 8 years, 2 months ago

CBSE > Class 12 > Biology

2 answers

Neha Sharma 8 years, 2 months ago

Saheli is an oral contraceptive for females containing a non-steroidal preparation.It is a once a week pill with very few side effects and high contraceptive value.

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Vineit Kumar Gupta 8 years, 2 months ago

A contraception ( anyways i am from pcm )

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What is transcription? Explain it in prokaryotes and eukaryotes

Posted by Vidhi Rawat 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Arti Kumari 8 years, 2 months ago

It is the process of copying genetic information from one strand of the DNA into RNA. And u read ncert book

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What is full form of condom

Posted by Moin Choudhary 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Prachi K 8 years, 2 months ago

There is no fullform of condom

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What is spermiogenesis?

Posted by Pranay G 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Abc Efg 8 years, 2 months ago

The spermatids are transformed into spermatozoa(sperm) by the process called spermiogenesis...

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Cbse 2017—18 sample papers

Posted by Shubham Rai 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Bhumi Jain 8 years, 2 months ago

You will get in the official site cbse.nic.in

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What is lac operon

Posted by Amisha Sahu 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Bhumi Jain 8 years, 2 months ago

The lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. The three genes of the lac operon can be expressed and their subsequent proteins translated: lacZ, lacY, and lacA. The gene product of lacZ is β-galactosidase which cleaves lactose, a disaccharide, into glucose and galactose. lacY encodes Beta-galactoside permease, a protein which becomes embedded in the cytoplasmic membrane to enable transport of lactose into the cell. Finally, lacA encodes β-galactoside transacetylase.

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Combetition affects both the organisms.how

Posted by Hari Kr 8 years, 2 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Mention four improved characteristics of wheat that helped India to achieve self sufficiency in wheat production

Posted by Aakriti Mehara 8 years, 2 months ago

CBSE > Class 12 > Biology

25 answers

Divya Sen 8 years, 2 months ago

Why r u saying sry bhumi infact i m sry bcoz i was just saying all these for fun.

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Bhumi Jain 8 years, 2 months ago

Sry

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Abc Efg 8 years, 2 months ago

Sonalika, Kalyan Sona are the wheat variety..but not an Indian wheat variety, a variety developed to introduced high-yielding, semi-dwarf, pest and insect resistance and to increase tolerance to environment.

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Divya Sen 8 years, 2 months ago

Yes that is what the ans is why u did't said earlier bhumi.

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Bhumi Jain 8 years, 2 months ago

High yielding,resistant to diseases such as Leaf and stripe rust,hill bunt

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Divya Sen 8 years, 2 months ago

Yeah sure komii s plzz give the ans i would like to know bcoz i don't know and bhumi is also incorrect?

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Divya Sen 8 years, 2 months ago

Excuse me you had just given the names but the characteristics are asked

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Bhumi Jain 8 years, 2 months ago

Thnks komiii s plzz give ans

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Bhumi Jain 8 years, 2 months ago

I gave 3 ,Ok once again I'm 1.Sonalika 2.Kalyan sona 3.Triticum aestivum

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Abc Efg 8 years, 2 months ago

Can I help u... Plzz ask to me.. I will give perfect answers of all the questions

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Abc Efg 8 years, 2 months ago

I think u both were confused so much...

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Bhumi Jain 8 years, 2 months ago

Plzz concentrately read my ans before only I told 2 names and after few time I had wrote the 3rd name...

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Divya Sen 8 years, 2 months ago

You only gave 1

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Divya Sen 8 years, 2 months ago

That's what i asked what are they??

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Bhumi Jain 8 years, 2 months ago

By the way Akriti has asked improved characteristics..

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Bhumi Jain 8 years, 2 months ago

I never said point,I said I know only three out of four characteristics

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Divya Sen 8 years, 2 months ago

And by the way triticum aestivum is the scientific name not a point??

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Divya Sen 8 years, 2 months ago

No no i m good enough in my concentration towards my studies dear.. and as i have seen your ans i haven't seen three points there is only point in ur ans

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Bhumi Jain 8 years, 2 months ago

This answer is correct..plzz read NCERT book carefully with concentration. I think you should concentrate even more on your studies...

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Bhumi Jain 8 years, 2 months ago

Divya sen, thnxs for saying me intelligent,although I am...

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Bhumi Jain 8 years, 2 months ago

Triticum aestivum,I know only three...

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Divya Sen 8 years, 2 months ago

Four characteristics are asked i also don't know plz tell.