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Can we say that Dormancy (in case of plants) and Diapause (in case of zooplankton) are similar???

Posted by Mrutyunjay Khatua 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Muskaan Vig 5 years, 11 months ago

In terms of their process we can say that the both are similar because in both dormancy and diapause plant or organism go into suspended development but the difference between them is that term dormancy is for plants and diapause is for animals and insects...

ANSWER

Difference between implants and injectable.

Posted by Satya Prakash 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Anup Kumar 5 years, 11 months ago

Implants are inserted in the body through surgery... But injectables are liquids and are taken by boring under the skin

ANSWER

Can u plz tell me the meaning of this sentence- Even in minimal communities, many interactive linkages exist, although all may not be readily apparent.( Ch- organism and population)

Posted by ? ? 5 years, 11 months ago

CBSE > Class 12 > Biology

5 answers

Muskaan Vig 5 years, 11 months ago

Welcome.

? ? 5 years, 11 months ago

Thanku

Muskaan Vig 5 years, 11 months ago

This means that no specie in this world can live on its own... even in minimal communities means small communities all species depend on each other there are interactions(linkages) between them Though we are not able to see them or scientists have not discovered these interactions or dependency b/w them but they (interactions) exist...

? ? 5 years, 11 months ago

Pg 232 ..... population interaction..... 1st para last line

Muskaan Vig 5 years, 11 months ago

Please tell Page no. ?

ANSWER

Tell me some important topics of biotech and its applications...

Posted by Advika Thakur 5 years, 11 months ago

CBSE > Class 12 > Biology

2 answers

Kriti Sharma 5 years, 11 months ago

Hi................ important topics of biotechnology and its applications ............................most important question from this is about the benefits of genetic modifications in plants ............such as because of these genetic modification through biotechnology ..................crops have become more tolerant to abiotic stresses such as cold drought post harvest losses are reduced............... nutritional value of food is enhanced .................the concept of BT toxin is really very important ................and the the fact that it remains inactive until ingested by insect then it is converted to a active form of toxin...................... RNA interference is very important topic.......,........ the structure of insulin ..............and its maturation into mature insulin is very important................... the role of C peptide is very important................. gene therapy is very important .................the case of first gene therapy which was done on a 4 year old girl with adenosine deaminase deficiency is important ....................polymerase chain reaction and its use in molecule diagnosis...................... Elisa................ enzyme-linked immunosorbent assay which is based on the principle of antigen antibody interaction is important ..................milk quality of first transgenic cow Rosie is important ............biopiracy ...................and biopatent is important that's it............?????

Abc ?⏳ 5 years, 11 months ago

Chapter 11: Biotechnology: Principles and Processes.......... Genetic engineering (Recombinant DNA technology). ............ Chapter 12: Biotechnology and its Applications.......... Application of biotechnology in health and agriculture....... Human insulin and vaccine production........ Stem cell technology.......... Gene therapy........... Genetically modified organisms - Bt crops; transgenic Animals; biosafety issues, bio piracy and patents

ANSWER

LISTEN EVERYONE.....the syllabus had not be completed in my school. So can anyone suggest me the best youtube channel to score 70 out of 70

Posted by Meghna Sharma 5 years, 11 months ago

CBSE > Class 12 > Biology

6 answers

Riya Rana 5 years, 11 months ago

Vedantu biotonic....but you would have to follow it religiously at this time....

Mahi Singh 5 years, 11 months ago

Vedantu the best channel....... that helps in your study

Kriti Sharma 5 years, 11 months ago

Welcome?

Meghna Sharma 5 years, 11 months ago

Thanks

Meghna Sharma 5 years, 11 months ago

Kk

Kriti Sharma 5 years, 11 months ago

What syllabus is not completed ......... Go and watch vedantu ....biotonic..........its really very helpful .......?????????

ANSWER

bio paper tough aata h kya?

Posted by Falguni Soni 5 years, 11 months ago

CBSE > Class 12 > Biology

4 answers

Ahmad Kashan Zain 5 years, 11 months ago

es baar aane ki chances hai?

Riya Rana 5 years, 11 months ago

Depends on preparation..

Shruti Jha 5 years, 11 months ago

Neither*

Shruti Jha 5 years, 11 months ago

Neother tough nor easy!

ANSWER

Send me all chapter important topic

Posted by Hanshika Saini 5 years, 11 months ago

CBSE > Class 12 > Biology

9 answers

Riya Rana 5 years, 11 months ago

Thanks abc it was really helpful...?

Abc ?⏳ 5 years, 11 months ago

I hv tried to cover almost all imp. Topics but for scoring full u hv to focus only on NCERT as its each & every line is imp....but while preparing.....these topics shouldn't be left..... Although these topics are looking too much but with planned, systematic strategy & target u can cover these topics in just 5️⃣ days.....All the best ...!!!!? Hope this may help u.....?

Abc ?⏳ 5 years, 11 months ago

Chapter 15: Biodiversity and Conservation____ Concept of biodiversity____ Patterns of biodiversity____Biodiversity conservation____Hotspots___Endangered organisms____Biosphere reserves, national parks, sanctuaries and Ramsar sites____Chapter 16: Environmental Issues____Air pollution and its control____Water pollution and its control____Agrochemicals and their effects____Solid waste management____Radioactive waste management____Greenhouse effect and climate change___ Ozone layer depletion

Abc ?⏳ 5 years, 11 months ago

Chapter 13: Organisms and Population____ Organisms and environment____ Habitat and niche____Population and ecological adaptations____ Population interactions-mutualism, competition, predation, parasitism____Population attributes - growth, birth rate and death rate, age distribution____Chapter 14: Ecosystem_____Ecosystems: Patterns, components____Productivity and decomposition___Energy flow; pyramids of number, biomass, energy____Nutrient cycles (carbon and phosphorous)____Ecological succession____Ecological services - carbon fixation, pollination, seed dispersal, oxygen release

Abc ?⏳ 5 years, 11 months ago

Chapter 11: Biotechnology: Principles and Processes____ Genetic engineering (Recombinant DNA technology), gel electrophoresis____ Chapter 12: Biotechnology and its Applications_____Application of biotechnology in health and agriculture____Human insulin and vaccine production____Stem cell technology____Gene therapy____Genetically modified organisms - Bt crops; transgenic Animals; biosafety issues, bio piracy and patents

Kriti Sharma 5 years, 11 months ago

From the very first chapter.................. examples of vegetative part are important for example ......................................name the vegetative part of jasmine....................... it is stolons ...........................water hyacinth............... concept on bamboo............................... from 2nd chapter ...............structure of mature Pollen grain .............surrounding layers .............................megasporogenesis .........microsporogenesis .............................role of sporopollenin........... tapetum............... all types of pollination ............outbreeding devices ..........labelled diagram of monocotyledon and dicotyledon seed ............................differentiation between albuminous and non albuminous seeds .............................with example ......................false fruit ..........................true fruit .....................from third chapter role of hormones in spermatogenesis ............and oogenesis ..............and chromosome number................. menstrual cycle with its days............. stage of maturation of OVA................................ with flowchart structure.............. hormones during pregnancy............... from the 4th chapter non medicated intrauterine devices .............copper releasing hormone......... releasing .................. lactational amenorrhea .........................concept of Saheli.............................. sterilization methods .............principles of. inheritance and variation................ mendel's laws............................ drawing the test crosses and various crosses ..............different types of *** determination mechanism........................... found in birds................ insects ............genetic. disorders and chromosomal. disorders.................from molecular basis of inheritance............... transforming. principle ........,...................Packaging. of DNA ..................processes of replication............. transcription........... translation.............. for 5 marks Lac Operon .................are. very. important............... application and goals of Human Genome Project.............. from evolution......... miller's experiment .............examples of homo logos .................and analogous .............evolution of man .............................L amarks theory ...............Hardy weinberg principle......??????

Abc ?⏳ 5 years, 11 months ago

Chapter 9: Strategies for Enhancement in Food Production_____ Improvement in food production____Plant breeding____Tissue culture____Single cell protein_____Biofortification____Apiculature and Animal husbandry____Chapter 10: Microbes in Human Welfare____Household food processing____Industrial production____Sewage treatment____Energy generation and microbes as biocontrol agents and biofertilizers____Antibiotics - production and judicious use

Abc ?⏳ 5 years, 11 months ago

Chapter 7: Evolution____Biological evolution and evidences for biological evolution (paleontological, comparative anatomy, embryology and molecular evidence)_____Darwin's contribution____Modern synthetic theory of evolution____Mechanism of evolution - variation (mutation and recombination) and natural selection with examples____Types of natural selection___Gene flow and genetic drift____Hardy - Weinberg's principle____Adaptive Radiation____Human evolution___Chapter 8: Human Health and Disease___Pathogens: parasites causing human diseases and their control____Basic concepts of immunology - vaccines: cancer, HIV and AIDs___Adolescene____Drug and alcohol abuse

Abc ?⏳ 5 years, 11 months ago

Chapter 5: Principles of Inheritance and Variation_____ Heredity and Variation: Mendelian inheritance _______Deviations from mendelism - incomplete dominance, co-dominance, multiple alleles and inheritance of blood groups, pleiotropy_____Elementary idea of polygenic inheritance_____Chromosome theory of inheritance_____Chromosomes and genes____Sex determination - in humans, birds, honey bee_____Linkage and crossing over_____Sex linked inheritance - haemophilia, colour blindness_____Mendelian disorder in humans - thalassemia____Chromosomal disorders in humans____Down's syndrome, Turner's and Klinefelter's syndromes.______Chapter 6: Molecular Basis of Inheritance_____Search for genetic material and DNA as genetic material_____Structure of DNA and RNA____DNA packaging & DNA replication_____Central dogma transcription, genetic code, translation_____Gene expression and regulation - lac operon____Genome and human and rice ganeome project_____DNA fingerprinting

ANSWER

Scientific name of date palm and lupine

Posted by Falguni Soni 5 years, 11 months ago

CBSE > Class 12 > Biology

2 answers

? ? 5 years, 11 months ago

Its lupinus articus.....refer ncert pg 38

Nisarg Fanasia 5 years, 11 months ago

Date palm: Phoenix dactylifera Lupine: Articus lupinus

ANSWER

What should i do for this paper ncert or exam idea or anthing else ?

Posted by Harkaranbir Singh 5 years, 11 months ago

CBSE > Class 12 > Biology

6 answers

Harkaranbir Singh 5 years, 11 months ago

Thns

Rea Rea 5 years, 11 months ago

Go through the previous year questions... It gives an idea how questions are going to be asked......

Kriti Sharma 5 years, 11 months ago

See the main thing is that it depends on your preparation level.................. because NCERT is the key to score good marks.......... not good but really good marks............... directly Jumping On exam idea will make you feel that you don't know the concepts .......................because you will not be able to remember them .................because you haven't read the chapter before............ first of all go and read NCERT then do exam idea questions........... yes do practice NCERT exampler ...............because it's the first time that we are getting MCQ ............that might come for the first time from NCERT exampler............?????

Mrutyunjay Khatua 5 years, 11 months ago

After completing NCERT u can prefer Xamidea

Mrutyunjay Khatua 5 years, 11 months ago

NCERT

Harkaranbir Singh 5 years, 11 months ago

For biology paper

ANSWER

I want blue print for biology

Posted by Pagundla Venki 5 years, 11 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Explain translation

Posted by Varsha Tripathy 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Kriti Sharma 5 years, 11 months ago

Translation is the process of polymerization of amino acids to form polypeptide ..................in simple words just the formation of proteins that is the end result of Central dogma of Biology .......................proposed by Francis Crick ......................,the amino acids joined by peptide Bond forms protein............... process of translation involves activation of amino acid ...............that is is charging of t RNA............. then comes process of initiation of polypeptide synthesis...................... then comes polypeptide chain elongation determination..........??????

ANSWER

what is biofortification??

Posted by Ahmad Kashan Zain 5 years, 11 months ago

CBSE > Class 12 > Biology

5 answers

Kriti Sharma 5 years, 11 months ago

Your welcome?

Ahmad Kashan Zain 5 years, 11 months ago

thks yaar simple kar ke batane or leye?

Ahmad Kashan Zain 5 years, 11 months ago

yaar kriti aap ka sab clear hai top karne ka erada hai??

Kriti Sharma 5 years, 11 months ago

It is the process of developing crops with higher level of nutrients ...............vitamins .................minerals ................proteins ................fats.................. main aim of biofortification is to improve public health ...................by ensuring protein content and quality .............Oil content and quality............. Vitamin content.................. and mineral content................ There are several crops which have been improved like............ Atlas 66............... have high protein content ............maize hybrid have high amount of.............. lysine and tryptophan............ iron fortified rice has increased iron content.........???????

Varsha Tripathy 5 years, 11 months ago

Process of breeding to inc. the nutritional value in crop

ANSWER

Who proposed central dogma

Posted by Amazing World 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Mrutyunjay Khatua 5 years, 11 months ago

Francis Crick

ANSWER

Gestation period

Posted by Vikas Vishwakarma 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Kriti Sharma 5 years, 11 months ago

Gestation period is the nine month pregnancy period of a woman in which an embryo grows inside her body into a fully developed foetus.................. it is 9 months for human females...????

ANSWER

Explain restriction endonuclease

Posted by Falguni Soni 5 years, 11 months ago

CBSE > Class 12 > Biology

3 answers

Falguni Soni 5 years, 11 months ago

Thanks kirti??

Aman Sharma 5 years, 11 months ago

good explaination

Kriti Sharma 5 years, 11 months ago

Restriction enzymes also known as molecular Scissors................... do you know why they are called scissors because they are used for cutting DNA................. the first restriction endonuclease was Hind 2 ....................they are different from exonuclease as they cut at specific positions within the DNA ...........................and specific positions are the specific palindromic nucleotide sequences ..............palindrome..................... in DNA sequence of base pairs are those read same on two strands when orientation of reading is kept same .......that's it.....????

ANSWER

What is darwin theory

Posted by Falguni Soni 5 years, 11 months ago

CBSE > Class 12 > Biology

2 answers

Falguni Soni 5 years, 11 months ago

Thanks ??

Kriti Sharma 5 years, 11 months ago

Darwinian theory of evolution....................... is based on his observations during the sea voyage around the world in ship HMS Beagle................... the two key concepts of darwinian theory are .................branch decent............... which is also called............... adaptive radiation................ and ..............natural selection ...............what is natural selection is ....,...................... the organisms which survive better in natural conditions are the fittest...................... Darwin theory support survival of the fittest ..................adaptability is inherited ................and the fitness is the end result of the ability to adapt and get selected by the nature and...................... in our NCERT book examples of natural selection are given............ industrial melanism.......... and ............chemical resistant .........and read them........????????

ANSWER

What is point mutation? Give one example

Posted by Vishal ? 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Abc ?⏳ 5 years, 11 months ago

A point mutation or substitution is a genetic mutation where a single nucleotide base is changed, inserted or deleted from a sequence of DNA or RNA. Point mutations have a variety of effects on the downstream protein product—consequences that are moderately predictable based upon the specifics of the mutation.

ANSWER

Which type of questions will be asked from 1unit in board exam 2020

Posted by Shivangi Gupta 5 years, 11 months ago

CBSE > Class 12 > Biology

1 answers

Shivangi Gupta 5 years, 11 months ago

Thank u kriti

ANSWER

kriti biology me last unit X (10) ki imp tropic batadejeye?

Posted by Ahmad Kashan Zain 5 years, 11 months ago

CBSE > Class 12 > Biology

3 answers

Kriti Sharma 5 years, 11 months ago

You are welcome??????

Ahmad Kashan Zain 5 years, 11 months ago

thnks??

Kriti Sharma 5 years, 11 months ago

Hi ............we all students think that the last Unit that is Ecology is very easy .............but trust me it is one of the most difficult ..........because we cannot write the stories from our mind in the chapter ..............there are many important topics in this chapter ...............like concepts based on .........eurythermal and ...........stenothermal organisms........... eurythermal are those that can tolerate wide range of temperature....... where as stenothermal are those which can tolerate narrow range of temperature ............trust me it is very important...... Uri haline............stenohaline ............questions based on ................conformers the organism in which of water concentration of body Fluids changes with that of osmotic concentration of ambient water are called conformers ...............hibernation and.............. aestivation........... diapause the example of these are really very important..................... expanding stable and declining age pyramids for human population revise them nicely............... exponential growth ..........Logistic growth curves................. examples of population interaction are very very important .........units of productivity.......................... 10% law full form of ...........p a r that is photosynthetically active radiation.............. ecological pyramids.................. nutrient cycles................ with diagrams examples of............ in situ conservation and ex situ conservation............. electrostatic precipitator................are very very important .............scrubber very very important ..............catalytic converters ...............biomagnification with its diagrams and application ...........eutrophication................. ecosan toilets ..................which have been developed in areas of Kerala and Sri Lanka for ecological sanitation................are very important.................. case study remedy for plastic waste of Ahmed Khan from Bengaluru given in NCERT ...............polyblend which is recycled modified plastic............... this mixture is used with bitumin to Lay roads.................harmful effects of radioactive waste and ...................................disposal of radioactive waste.?????

ANSWER

what is taq polymerase?

Posted by Ahmad Kashan Zain 5 years, 11 months ago

CBSE > Class 12 > Biology

7 answers

Kriti Sharma 5 years, 11 months ago

Yes i am a student of class 12 of dav school ????

Muhammed Faraz 5 years, 11 months ago

Nice explanation @kriti sharma Are you too a student?

Ahmad Kashan Zain 5 years, 11 months ago

are yaar mujhe kaam tha to mai ne poocha.??bair haal

Abc ?⏳ 5 years, 11 months ago

I think this app isn't for personal chats or asking these silly, worthless, useless ques....? & What's the need of asking others school & center tell urs only.....

Ahmad Kashan Zain 5 years, 11 months ago

kriti aap ka center kahan gaya hai or aap kis school se hai

Kriti Sharma 5 years, 11 months ago

PCR is polymerase chain reaction ........it has three steps ...........denaturation.......... annealing and extension during the process of denaturation............... a high temperature is given to the DNA for the...............purpose so that DNA doesn't get denatured we use thermostable that is heat tolerable .........DNA polymerase called taq polymerase .......which can tolerate the high temperature of the reaction.......?????

Charumathi Thangaraj 5 years, 11 months ago

Taq polymerase is a thermostable DNA polymerase1 named after the bacterium Thermus aquaticus.It is used in annealing process of PCR.

ANSWER

last unit se imp question bataey

Posted by Ahmad Kashan Zain 5 years, 11 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

what are evolution

Posted by Sachin Sachin 6 years ago

CBSE > Class 12 > Biology

1 answers

Kriti Sharma 6 years ago

Evolution is the process of formation of new life form on the earth surface .............experimental evidence of chemical evolution was provided by miller's experiment.............. in which non-cellular biomolecules exist in the form of DNA RNA ..............there are many theories of evolution like.......... lamarck's theory ................which is very simple it states that evolution of life forms occur due to use and disuse of organs ...............then comes the ..........Darwinian theory.......... which is based on............ branching Descent.............. that is ...........adaptive radiation ............and........... natural selection ............example of natural selection can be seen from industrial melanism ..........last is mutation. theory of evolution was put forward by Hugo De vries .........based on his work on evening Primrose .......then Hardy weinberg principle and evolution of man....??????

ANSWER

Molecular theorey of inheitance

Posted by Nikhil Gupta 6 years ago

CBSE > Class 12 > Biology

1 answers

Kriti Sharma 6 years ago

Molecular basis of inheritance is a little bit difficult chapter......... this chapter basically speaks of DNA ......RNA ........., DNA comprises of ribose sugar........ nitrogenous base....... and phosphate group .................the chargaff rule is really very important ........because numericals come from this rule OK.......... then comes the central dogma replication leads to formation of DNA......... DNA transcription lead to the formation of MrNA......... and then proteins are formed by translation .......Packaging of DNA in prokaryotes is very simple .....dna is a negatively charged molecules what is packed by positively charged non histone proteins............ in eukaryotes formation of nucleosome takes place .........difference between euchromatin and hetero chromatin is really very important .........the main question is ..............which one is transcription active and which one is not ..............so euchromatin is transcriptionally active............ then come some of the principles and experiments .......... DNA replication which is very simple depends on some enzymes DNA polymerase for polymerisation dna helicase to unwind DNA strand......... DNA ligase joins the okazaki fragments ......transcription which is important .......there only three parts involved promoter....... inhibitor ........structural gene the processes of three steps ........initiation......... elongation......... termination ...........genetic code really very important especially stop codons that is which do not code for amino acids ........then come RNA the adaptor molecule structure .........then translation......... translation three steps initiation ..........elongation ..........termination then comes Lac Operon really very important............... Human Genome Project ............what is important is methodologies of Human Genome Project ................salient features and DNA fingerprinting by ...........Alec jeffreys...........??????

ANSWER

Sir biology m chapter wise waight kya ho gi

Posted by Sahibe Alam Gazi 6 years ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Kitno ka 85% above %aane ka chance h

Posted by Varsha Tripathy 6 years ago

CBSE > Class 12 > Biology

3 answers

Raghav Ram 5 years, 11 months ago

i will fail or rarely pass the exam . I think now that I everything ended .

Manjay Jha 6 years ago

I don't know about biology but abhi tak jitne paper huye h uske according i think i will score 85% baki Rab hi jaane.

Manjay Jha 6 years ago

I think mine!

ANSWER

Which chapter is imp.for 5marks

Posted by Varsha Tripathy 6 years ago

CBSE > Class 12 > Biology

3 answers

Kriti Sharma 6 years ago

Hiiiii varsha........... basically the chapters which are important for 5marks is ...............molecular basis of inheritance from this chapter comes directly the...... processes of replication....... transcription ..........and translation ........one of most favourite topic is....... lac operon......... trust me it really very important ............ Questions from unit reproduction like explain...... spermatogenisis .........oogenesis ................with diagram comes......... okkkk......sometimes ....crosses ..............from genetics also come in 5marks......genetic and mendalian disorders........... from genetics............... are very important for 5 marks see we can only tell you some basic idea but you should see previous year questions okkkkkkk?????......

Abc ?⏳ 6 years ago

Unit - Reproduction, genetic & evolution, ecosystem & environment

Manjay Jha 6 years ago

Genetic biotechnology and ecosystem

ANSWER

Tell me some important diagrams

Posted by Advika Thakur 6 years ago

CBSE > Class 12 > Biology

2 answers

Kriti Sharma 6 years ago

Important diagrams are diagram of.......... mature pollen grain .........diagram of .....seed........ diagram of male and female reproductive system............ seminiferous tubule ............schematic representation of.......... spermatogenesis......... structure of sperm ..........graph of uterine events.......... diagram of bioreactor.............. both simple stirred tank and sparged stirred tank.................. diagram of gobar gas production plant ............life cycle of HIV .............structure of antibody molecule............. very important stages in the life cycle of plasmodium ................polymerase chain reaction .............biomagnification ...............diagram pyramids of biomass......... pyramid of energy .............number .............carbon cycle..................... Phosphorus cycle electrostatic precipitator............, scrubber............?????

Varsha Tripathy 6 years ago

Vedantu has uploaded

ANSWER

Schedule kya bnaya paper ki tyaari ka lya????

Posted by Shefu ??????? 6 years ago

CBSE > Class 12 > Biology

2 answers

Manjay Jha 6 years ago

Sab ready hain bad padhna h ab????

Nishant Sharma 6 years ago

PADHAI KRNI HAI BASS.!

ANSWER

I was reading some bio toppers interview and even they haven't score 100. Max is 99.5. Is 100 difficult or it is just our mindset that a student cant score 100?

Posted by Astitva Singh 6 years ago

CBSE > Class 12 > Biology

5 answers

Charumathi Thangaraj 5 years, 11 months ago

See getting ? is not tough in bio if u are thorough 100% with each and every topic.If u read every chp thoroughly and all imp diagrams and topics properly u can also score ?.?☺️

Raghav Ram 5 years, 11 months ago

wow

? ? 6 years ago

Marks in boards are never given in decimal....and even if it is then it is rounded of

Kriti Sharma 6 years ago

Two students scored 100, in bio from our school????

Sanchari Roy 6 years ago

One student scored ? in bio 2019 from our school.

ANSWER

Most probable chapter which comes in 5 marks question

Posted by Nandlal Rajwade 6 years ago

CBSE > Class 12 > Biology

1 answers

Abc ?⏳ 6 years ago

Unit - Reproduction, genetic & evolution, ecosystem & environment

ANSWER

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