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Trace the journey of ovum from ovary its fertilization and further development until the implantation takes place.?

Posted by Sanya Maske 7 years, 7 months ago

CBSE > Class 12 > Biology

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Enumerate the structural chemical and functional differencer between dna and rna

Posted by Kiruthika .N 4 years, 6 months ago

CBSE > Class 12 > Biology

1 answers

Sia ? 4 years, 6 months ago

Differences Between DNA and RNA

DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. The only difference between ribose and deoxyribose is that ribose has one more -OH group than deoxyribose, which has -H attached to the second (2') carbon in the ring.
DNA is a double-stranded molecule, while RNA is a single-stranded molecule.
DNA is stable under alkaline conditions, while RNA is not stable.
DNA and RNA perform different functions in humans. DNA is responsible for storing and transferring genetic information, while RNA directly codes for amino acids and acts as a messenger between DNA and ribosomes to make proteins.
DNA and RNA base pairing is slightly different since DNA uses the bases adenine, thymine, cytosine, and guanine; RNA uses adenine, uracil, cytosine, and guanine. Uracil differs from thymine in that it lacks a methyl group on its ring.

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what are ubisch body

Posted by Surender Yadav 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Niharika Srivastav 7 years, 7 months ago

Ubisch bodies are the lipid bodies, that occur in tapetum walls of sporopollenin.

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Define cell?

Posted by Soham Mehta 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Niharika Srivastav 7 years, 7 months ago

Cell is the basic unit of all living things except viruses.

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Soham Mehta 7 years, 7 months ago

Cell is the basic unit of life

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Bisexual flowers

Posted by Satish Kumar Singh 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Om Kunal 7 years, 7 months ago

Plants containing both androecium and gynoecium on the same plant are termed as bisexual flowers

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hw to define reproduction??

Posted by Harsh Solanki 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Soham Mehta 7 years, 7 months ago

Reproduction is a biological process, where new off springs are born that have similar traits as that of the parents

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Vineeta Jeena 7 years, 7 months ago

Reproduction is a biological process , in which an organisms gives rise to new young ones similar to itself

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Advantages of apomixis over hybridisation

Posted by Mehak Chhabra 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Niharika Srivastav 7 years, 7 months ago

ADVANTAGE:- Apomixis is that it would drastically reduce the cost of hybrid production, so that plant breeders produce new varieties of seeds more quickly and more cheaply.

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why are human testes located outside ihe abdominal cavity?

Posted by Aryan Dhiman 7 years, 7 months ago

CBSE > Class 12 > Biology

3 answers

M B 7 years, 7 months ago

As per the requirements of sperm formation

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Mansi Jaiswal 7 years, 7 months ago

Bcoz temperature outside abdominal cavity is less than body temperature. And formation of sperm takes place below body temperature ,i.e., 2 to 3 degree Celsius lower than body temperature.

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Rachit Sharma 7 years, 7 months ago

Because testis requires a temperature lower than the body i.e. 2 to 3celcius to produce sperm

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what is the gustation period of elephant

Posted by Sakshi Jadhav 7 years, 7 months ago

CBSE > Class 12 > Biology

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How do the potato,bryophyllum,ginzer and agave multiply asexually??

Posted by Vivek Mishra 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Aisa Singh 7 years, 7 months ago

Potato-adventious buds Bryoplyllum _adventious leaves Agave_bulbil

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What is the definition of biology?

Posted by Pukhraj Sukhwal 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Om Kunal 7 years, 7 months ago

Biology is that branch of science which deals with life processes of living organisms

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Mansee Saini 7 years, 7 months ago

The study of life is known as biology

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What is inniate

Posted by Suraj Agrawal 7 years, 7 months ago

CBSE > Class 12 > Biology

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Do variations appear in clones also? How?

Posted by Shweta Arya 7 years, 7 months ago

CBSE > Class 12 > Biology

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What is rf factor in the process of translation??

Posted by Anushka Shankar 7 years, 7 months ago

CBSE > Class 12 > Biology

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What is alleles

Posted by Sweety Sheoran 7 years, 7 months ago

CBSE > Class 12 > Biology

3 answers

Shweta Arya 7 years, 7 months ago

Ur welcome sweety

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Sweety Sheoran 7 years, 7 months ago

Thanks Shweta Arya

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Shweta Arya 7 years, 7 months ago

Simpy ,it is form of genes . Alleles are forms of same gene which are found at the same place or locus on homologous chromosomes and control particular traits of a character.

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Why is sexual reprodution favoured by fungi and algae in adverse conditions

Posted by Isha Ahuja 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Anushka Shankar 7 years, 7 months ago

because sexual reproduction brings variation into the individuals, some of which might help the individuals to adapt to the changed conditions and survive. This ensures the continuity of species.

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Write down three important functions of estrogen.. in females

Posted by Abc Kamboz 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Anushka Shankar 7 years, 7 months ago

Estrogen is responsible for development of the female body and the secondary sexual characters. It also stimulates growth of the inner lining of the uterus (endometrium) during the menstrual cycle, increases uterine growth, improves lubrication of the ******, and thickens the vaginal wall while increasing blood vessels to the skin.

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Aahana Khan 7 years, 7 months ago

It help in sexual reproduction

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Different between asexule and sexule reproduction .why are officpriong produce às a result of asexule reproduction called as clone

Posted by Lia Awomi 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

R.P Qureshi 7 years, 7 months ago

They r morphologically genetically ND structurely same that's why they r called clones or somaclones

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In simple words what is insertion inactivation?

Posted by Rahul Mawar 7 years, 7 months ago

CBSE > Class 12 > Biology

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Sucidal bag are

Posted by Prashant Bargahi 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Dipanshu Bokade 7 years, 7 months ago

Lysosomes

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Aryaman Singh Tomar 7 years, 7 months ago

Lysosomes

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Write the function of tropoblast

Posted by Aryaman Singh Tomar 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Anushka Shankar 7 years, 7 months ago

trophoblast is the peripheral cells of the blastocyst, which attach the blastocyst to the uterine wall and become the placenta and the membranes that nourish and protect the developing organism.

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Om Kunal 7 years, 7 months ago

It absorbs the nutritive fluid secreted by the uterine mucous membrane

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Is *** education necessary?

Posted by Aryaman Singh Tomar 7 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Mohit Kumar 7 years, 7 months ago

Oye your question is your answer. If you are not able to write that question properly,so why this type of education should be given.????

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Shweta Arya 7 years, 7 months ago

Oohh hello what's ur question

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Inheritance of two gene

Posted by Saiful Islam 7 years, 7 months ago

CBSE > Class 12 > Biology

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How the mode of action of hormone releasing IUD s different copper releasing IUDs

Posted by Diksha Chauhan 7 years, 7 months ago

CBSE > Class 12 > Biology

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Explain the stages of menustral cycle

Posted by Ama Babu 7 years, 7 months ago

CBSE > Class 12 > Biology

3 answers

Niharika Srivastav 7 years, 7 months ago

1.Menstrual phase (From day 1 to 5) 2. Follicular phase (From day 1 to 13) 3. Ovulation phase (Day 14) 4. Luteal phase (From day 15 to 28)

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Dipanshu Bokade 7 years, 7 months ago

There are 4 stages

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Mohd Salman Shafi 7 years, 7 months ago

There are four stages of menstrual cycle 1.Menstrual phase 2. Follicular phase 3.ovulation phase and 4. Luteal phase

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What do you mean by mediastinum????

Posted by Suvosrita Mishra 7 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Shefali Yadav 7 years, 7 months ago

The area between the lungs.the organs in the Mediastinum include the heart, large veins and arteries,the trachea, the esophagus, the bronchi and lymph. .. Hope it help ?

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Name the hormone which produce only during pregnancy

Posted by Anurag Pandey 7 years, 7 months ago

CBSE > Class 12 > Biology