BBYET 143 key facts: June 2026
- Course code: BBYET-143
- Subject: Economic Botany and Biotechnology (course books titled Economic Botany and Plant Biotechnology)
- Programme: Bachelor of Science (General), BSCG: Discipline Specific Elective in Botany
- Credits: 4
- Blocks and units: 4 blocks, 15 units
- Maximum marks: 50 (term-end exam)
- Duration: 2 hours
- Questions in the June 2026 paper: 7 (Q1 compulsory, then any 4 of Q2 to Q7)
- Companion lab course: BBYEL-144 Economic Botany and Biotechnology Laboratory
- Sample answers on this page: 2 (Q2 and Q4); all 7 in the paid file
BBYET 143 Solved Question Paper June 2026 gives complete, exam-length answers to all 7 questions IGNOU set in the June 2026 Economic Botany and Biotechnology term-end exam.
1. What the June 2026 Solved Paper Covers
BBYET-143 is a 4-credit Discipline Specific Elective in Botany within IGNOU's Bachelor of Science (General) programme, BSCG, taught through 4 blocks and 15 units.
The June 2026 paper splits almost evenly between the two halves of the course. Blocks 1 and 2 supply the plant-use questions on Vavilov, cereals, tea, wood and the botanical names of jute, hemp, periwinkle, pine and opium. Blocks 3 and 4 supply tissue culture, the Ti plasmid, recombinant DNA work, GMO biosafety and molecular markers.
That split creates a real choice. Only Question 1(a) forces you to write economic botany. A student confident in biotechnology can take Questions 4, 5, 6 and 7 and never write a long Block 1 or 2 answer, while a student who prefers plant uses can lean on Questions 2 and 3. Our file answers every option, so you can compare both routes.
If you are collecting papers across the whole course list, our BSCG Question Paper collection groups this elective with the other Bachelor of Science (General) papers.
2. Two Answers Solved in Full, Five Held Back
Two full questions, Question 2 and Question 4, are solved below exactly as they appear in our file; the other 5 are listed afterwards as question text only.
These two were chosen because each covers one half of the course: Question 2 is pure economic botany from Block 1, and Question 4 is pure plant tissue culture from Block 3.
Vavilov's centres of origin, and the genetics of domestication
Question 2 (a): Describe the concept of centres of origin of plants according to Vavilov. (7)
Question 2 (b): What is meant by the top-down and bottom-up approach to the genetic basis of domestication? (3)
(a) Vavilov's centres of origin
Nikolai Ivanovich Vavilov (1887 to 1943) was a Russian botanist and plant geneticist who organised plant-collecting expeditions across many countries from the 1920s onwards. The seeds he gathered formed the core of the collection now held by the N.I. Vavilov Institute of Plant Genetic Resources (VIR) in St Petersburg. From this material he developed the concept of centres of origin of cultivated plants.
Method used. Vavilov used what he called the differential phytogeographic method. He collected large samples of each crop from across its whole growing range, sorted them by morphological, physiological and genetic characters, and mapped where the varieties came from. He argued that the region holding the greatest number of varieties of a crop, along with its wild relatives, is the most likely place where that crop was first domesticated.
Main ideas of the concept
- A primary centre is the region of maximum genetic diversity of a crop, where its wild progenitors and related species still grow.
- A secondary centre is a region away from the original home where the crop, after migration, built up fresh diversity through local selection and crossing with other forms.
- Dominant characters tend to be concentrated near the centre, while recessive forms become more common towards the edges of the range, where isolation and inbreeding expose them.
- Most centres lie in mountainous or hilly regions, where varied climate, soil and isolation between valleys preserved many distinct local forms.
The centres
Vavilov first described five centres in 1926 and later expanded the scheme to eight main centres with three sub-centres. The commonly taught list, with typical crops, is:
- Chinese centre: soybean, foxtail millet, peach and Chinese cabbage.
- Indian (Hindustan) centre: rice, sugarcane, pigeon pea, brinjal, cucumber, mango and black pepper. Sub-centre 2a, Indo-Malayan: banana, coconut, clove and nutmeg.
- Central Asiatic centre (north-west India, Afghanistan and the Central Asian republics): common bread wheat, pea, lentil, onion, garlic and carrot.
- Near Eastern centre (Asia Minor, Transcaucasia, Iran): einkorn wheat, rye, grape, fig, pomegranate and alfalfa.
- Mediterranean centre: durum wheat, olive, cabbage, lettuce and sugar beet.
- Abyssinian (Ethiopian) centre: emmer wheat, barley forms, sorghum, teff, sesame and Arabian coffee.
- South Mexican and Central American centre: maize, common bean, upland cotton, sweet potato, chilli and cacao.
- South American centre (Peru, Ecuador, Bolivia): potato, tomato and lima bean. Sub-centre 8a, Chiloe: the common potato. Sub-centre 8b, Brazilian-Paraguayan: cassava, groundnut, pineapple and the rubber tree.
Significance. The concept told plant breeders where to search for useful genes such as disease resistance, drought tolerance and quality traits, because wild relatives and old landraces survive in these regions. It laid the groundwork for planned germplasm exploration, plant introduction and modern gene banks.
Limitations. Later workers showed that a region of high diversity is not always the place of first domestication, since diversity can build up secondarily. Some crops were domesticated in several places at once, and Jack Harlan (1971) proposed a scheme of centres and non-centres to handle crops that arose over wide, diffuse areas. Even so, Vavilov's centres remain the starting point for studying where crops came from.
(b) Top-down and bottom-up approaches
Both approaches try to find the genes that changed when wild plants became crops, but they start from opposite ends.
Top-down approach (phenotype to gene). Research begins with a known domestication trait, such as loss of seed shattering, reduced branching or larger fruit. The crop is crossed with its wild progenitor, the trait is mapped in the offspring as a quantitative trait locus, and the responsible gene is then isolated by fine mapping. Classic examples are teosinte branched1 (tb1), which controls plant architecture in maize, and sh4, which reduced grain shattering in rice.
Bottom-up approach (gene to phenotype). Research begins with DNA sequence data from many crop and wild plants. The genome is scanned for signatures of selection, such as regions where diversity in the crop has dropped sharply compared with the wild form. Genes in these regions become candidates, and their effect on a visible trait is tested afterwards. This approach can find domestication genes whose trait was never suspected.
In short, top-down moves from a trait to its gene, while bottom-up moves from a selected gene to its trait. The two are used together to confirm results.
Micro-propagation and the applications of embryo culture
Question 4 (a): Define micro-propagation and explain the steps involved in this technique with the help of a flow-chart. (5)
Question 4 (b): What are the different applications of embryo culture? (5)
(a) Micro-propagation and its steps
Definition. Micro-propagation is the rapid, true-to-type multiplication of plants in vitro, by culturing small explants such as shoot tips, nodal segments or meristems on a nutrient medium under aseptic and controlled conditions. It produces large numbers of genetically identical plantlets in a short time and small space.
Flow-chart to draw. Five boxes joined by downward arrows, in this order:
Stage 0: selection and preparation of the mother plant → Stage I: initiation (explant excised, surface sterilised, placed on medium) → Stage II: multiplication (repeated subculture on cytokinin-rich medium) → Stage III: rooting of shoots (auxin-containing medium) → Stage IV: hardening and transfer to soil
- Stage 0, mother plant preparation: a healthy, true-to-type plant is chosen and kept in a clean greenhouse, sometimes with fungicide sprays, to lower contamination in later stages.
- Stage I, initiation: explants are washed, dipped briefly in 70 per cent ethanol, surface sterilised with a sterilant such as sodium hypochlorite or mercuric chloride, rinsed in sterile water and placed on a medium such as Murashige and Skoog (MS) medium.
- Stage II, multiplication: shoots are cut and subcultured every few weeks on a medium with a cytokinin such as BAP, which releases axillary buds or induces adventitious shoots. This stage gives the exponential increase in numbers.
- Stage III, rooting: individual shoots are moved to a medium with an auxin such as IBA or NAA, often at half-strength salts, to form roots.
- Stage IV, hardening: agar is washed off the roots, and plantlets are planted in a sterile mix and kept under high humidity that is lowered gradually before field transfer.
Micro-propagation is used commercially for banana, potato, sugarcane, orchids and many ornamental plants.
(b) Applications of embryo culture
Embryo culture is the aseptic growth of mature or immature embryos, removed from seeds or ovules, on a nutrient medium. Its main applications are:
- Embryo rescue in wide crosses. In many interspecific and intergeneric crosses the hybrid embryo forms but aborts because the endosperm fails. Excising and culturing the embryo early saves the hybrid. Early work by Laibach on crosses between flax species in the 1920s established this use.
- Haploid production. In the bulbosum method, barley (Hordeum vulgare) is crossed with H. bulbosum. The bulbosum chromosomes are lost from the embryo, which must then be rescued by culture, giving haploid barley plants for quick production of pure lines.
- Overcoming seed dormancy. Seeds with long dormancy or hard seed coats can be germinated quickly by culturing the excised embryo, which saves months or years.
- Shortening the breeding cycle. Growing embryos directly on medium lets breeders raise a new generation faster in crops with slow seed development.
- Rescuing embryos of early-ripening fruits. In early varieties of peach and cherry the fruit ripens before the embryo matures, so seeds rarely germinate unless the embryos are cultured.
- Propagating rare plants and germplasm exchange. Coconut embryos are cultured for safe exchange of germplasm, and embryo culture helps multiply rare or endangered species.
- Testing seed viability and studying embryo development. Excised embryos grow quickly and show whether a seed lot is viable; the method also lets researchers study the nutrition and growth needs of developing embryos.
3. Questions Answered Only in the Full File
The questions below are printed exactly as they appear on the June 2026 paper. Their answers are available only in the full solved file.
Question 1 (a): Write the botanical names of the following plants. (5 × 1 = 5)
(i) Jute (ii) Hemp (iii) Periwinkle (iv) Pine (v) Opium
Question 1 (b): Fill in the blanks. (5 × 1 = 5)
(i) ............... is considered the most suitable explant for producing virus-free plants.
(ii) X-gal is the substrate for β-galactosidase in the technique of ............... .
(iii) ............... is the most preferred external source of carbon used in plant tissue culture media.
(iv) Vector pBR322 is derived from the organism ............... .
(v) ............... are the genetic markers that represent sites where DNA sequences differ by a single base.
Question 3 (a): Describe the morphological characters of any two cereals. (6)
Question 3 (b): What are the health benefits of various types of tea? (4)
Question 5 (a): Describe the structure of the Ti plasmid with the help of a well labelled diagram. (5)
Question 5 (b): Describe the applications of recombinant DNA technology. (5)
Question 6 (a): What are genetically modified organisms? Explain the biosafety regulations associated with research on genetically modified organisms. (2 + 4)
Question 6 (b): Describe the application of plant biotechnology in floriculture. (4)
Question 7: Write short notes on any four of the following. (4 × 2½ = 10)
(i) Restriction fragment length polymorphism
(ii) Protoplast culture
(iii) Genetic erosion
(iv) Uses of wood
(v) Southern blotting
Question 5 alone asks for a well labelled Ti plasmid diagram, and Question 7 lets you pick four of five short notes. Both are where students lose easy marks through missing labels or notes that run too long.
4. Syllabus, Block by Block
The course runs across 4 blocks and 15 units: Blocks 1 and 2 cover economic botany, and Blocks 3 and 4 cover plant biotechnology.
The table maps every unit to the June 2026 questions it fed. Units 3, 4, 6 and 10 were not used in this paper, which is typical: IGNOU rotates units between sessions rather than testing all 15 every time.
| Block | Unit | Topics to know | June 2026 questions |
|---|---|---|---|
| Block 1: Cereals, Legumes and Spices | Unit 1: Origin of Cultivated Plants | Vavilov's centres, move from gathering to cultivation, domestication genetics | Q2(a), Q2(b) (Sample 1), Q7(iii) |
| Block 1: Cereals, Legumes and Spices | Unit 2: Cereals | Origin, taxonomy and distribution of wheat and rice; grain structure | Q3(a) |
| Block 1: Cereals, Legumes and Spices | Unit 3: Legumes | Major pulse crops of India, nutritional value and health benefits | — |
| Block 1: Cereals, Legumes and Spices | Unit 4: Spices | Black pepper, turmeric and clove: morphology and uses | — |
| Block 2: Beverages, Fibres, Timber, Medicinal and Oil Yielding Plants | Unit 5: Beverages | Tea (Camellia sinensis) growing regions and black tea processing; coffee | Q3(b) |
| Block 2: Beverages, Fibres, Timber, Medicinal and Oil Yielding Plants | Unit 6: Oils and Fats | Oil-yielding plants, their morphology and uses | — |
| Block 2: Beverages, Fibres, Timber, Medicinal and Oil Yielding Plants | Unit 7: Fibre Yielding Plants | Classes of plant fibre; bast fibres such as jute and hemp | Q1(a)(i), Q1(a)(ii) |
| Block 2: Beverages, Fibres, Timber, Medicinal and Oil Yielding Plants | Unit 8: Medicinal Plants | Alkaloid-yielding plants such as Rauwolfia, periwinkle and opium poppy | Q1(a)(iii), Q1(a)(v) |
| Block 2: Beverages, Fibres, Timber, Medicinal and Oil Yielding Plants | Unit 9: Timber Plants | Teak, shisham and pine; paper making and other uses of wood | Q1(a)(iv), Q7(iv) |
| Block 3: Plant Biotechnology | Unit 10 | Scope and methods of biotechnology; rapid clonal propagation | — |
| Block 3: Plant Biotechnology | Unit 11 | Culture media composition, totipotency, organogenesis, somatic embryogenesis, protoplast fusion | Q1(b)(iii), Q7(ii) |
| Block 3: Plant Biotechnology | Unit 12 | Micro-propagation, androgenic and gynogenic haploids, embryo culture, secondary metabolites | Q1(b)(i), Q4(a), Q4(b) (Sample 2) |
| Block 4: Biotechnology: Techniques and Applications | Unit 13: Molecular Techniques | Northern, Southern and Western blotting; DNA fingerprinting; molecular markers; PCR and ELISA | Q1(b)(v), Q7(i), Q7(v) |
| Block 4: Biotechnology: Techniques and Applications | Unit 14: Recombinant DNA Technology | Cloning vectors, steps of molecular cloning, CRISPR-Cas9 genome editing | Q1(b)(ii), Q1(b)(iv), Q5(a), Q5(b) |
| Block 4: Biotechnology: Techniques and Applications | Unit 15: Application of Plant Biotechnology | Herbicide and pest resistant crops, quality traits, biosafety of GM crops | Q6(a), Q6(b) |
Unit 12 alone fed three June 2026 questions, including the whole of Question 4. If your revision time is short, Units 12 to 14 carry the most marks in this paper. Our BBYET 143 Study Material follows the same unit order, so you can read and practise side by side.
The official course books are on IGNOU's eGyanKosh page for BBYET-143, where each block is downloadable unit by unit.
5. How the Paper Is Set and Marked
The June 2026 paper has 7 questions for 50 marks in 2 hours: Question 1 is compulsory, and you answer any four of Questions 2 to 7.
| Question | Parts and marks | Course half | What makes it tricky |
|---|---|---|---|
| Q1 (compulsory) | (a) 5 botanical names, 5 × 1; (b) 5 fill-in-the-blanks, 5 × 1 | (a) economic botany; (b) biotechnology | One-line answers, but each name needs the correct genus and species form |
| Q2 | (a) 7 + (b) 3 | Economic botany, Unit 1 | The 7-mark part needs every centre with its crops inside about 15 minutes |
| Q3 | (a) 6 + (b) 4 | Economic botany, Units 2 and 5 | Morphology must run from root to grain for each of the two cereals chosen |
| Q4 | (a) 5 + (b) 5 | Tissue culture, Unit 12 | A flow-chart is demanded, so a prose-only answer to 4(a) loses marks |
| Q5 | (a) 5 with diagram + (b) 5 | Recombinant DNA, Unit 14 | The labelled diagram carries most of 5(a); a bare sketch scores poorly |
| Q6 | (a) 2 + 4, (b) 4 | Applications and biosafety, Unit 15 | Three separately marked pieces, starting with a 2-mark definition |
| Q7 | Any 4 of 5 short notes, 4 × 2½ | Mixed: Units 1, 9, 11 and 13 | Pick the four notes you can finish in 5 to 6 minutes each |
The pattern has tightened since earlier sessions. The June 2022 paper had 8 questions, with choice from Questions 2 to 8, and its Question 1 carried a third part asking for full forms of abbreviations. In June 2026 the choice pool shrank to six questions and Question 1 became a clean 5 plus 5.
You can check older sessions yourself through our IGNOU Previous Year Question Paper hub, which lists BBYET-143 papers by session.
Timing matters. Five answers in 120 minutes means about 24 minutes each. A 7-mark part like Question 2(a) deserves roughly 15 of those minutes, and a 2½-mark short note no more than 5 or 6.
6. Topics IGNOU Keeps Asking Again
Across the two official IGNOU papers we could download, June 2022 and June 2026, eight BBYET-143 topics were asked both times.
We used only papers from IGNOU's own sites: June 2022 from webservices.ignou.ac.in and the June 2026 paper itself. The other sessions since June 2022 were not available as official downloads, so this table does not claim five years of data.
| Topic | Unit | June 2022 | June 2026 | Times asked |
|---|---|---|---|---|
| Vavilov and centres of origin | Unit 1 | Q2(a), 5 marks | Q2(a), 7 marks (Sample 1) | 2 |
| Morphology of cereals | Unit 2 | Q2(b), rice with labelled diagram | Q3(a), any two cereals | 2 |
| Botanical names of economic plants | Units 2 to 9 | Q1(a): rice, groundnut, clove, teak | Q1(a): jute, hemp, periwinkle, pine, opium | 2 |
| Wood as a raw material | Unit 9 | Q4, paper making from wood | Q7(iv), uses of wood | 2 |
| Carbon source in culture media | Unit 11 | Q1(b)(iii), primary source | Q1(b)(iii), preferred external source | 2 |
| Applications of plant tissue culture | Unit 12 | Q5, practical applications | Q4(b), embryo culture uses (Sample 2) | 2 |
| Biosafety of GM crops | Unit 15 | Q6, definition and issues | Q6(a), regulations on GMO research | 2 |
| Southern blotting | Unit 13 | Q8(v), short note | Q7(v), short note | 2 |
| CRISPR-Cas9 technology | Unit 14 | Q7, methodology and significance | — | 1 |
| Micro-propagation steps | Unit 12 | — | Q4(a), with flow-chart (Sample 2) | 1 |
| Ti plasmid structure | Unit 14 | — | Q5(a), with diagram | 1 |
Notice how the same topic changes its marks. Vavilov went from 5 marks to 7, and Southern blotting stayed a short note both times. For a longer list built on more sessions, see our IGNOU Solved Guess Paper page, which is updated each term.
7. How Our Answers Are Written and Checked
Every answer in the file is written to the marks printed on the June 2026 paper and checked against the IGNOU block books before release.
Length follows marks. A 1-mark botanical name is one line, a 2½-mark short note runs to about 120 to 150 words, 5-mark parts get around 300 words, and the 7-mark Vavilov answer is close to 550 words. Examiners reward complete coverage at the right length, not padding.
Botanical names are written the way botany examiners expect: genus capitalised, species in lower case, both in italics, with the family added where it earns credit. Questions that ask for a diagram or flow-chart, like 4(a) and 5(a), get a clean labelled figure rather than a description of one.
The file was written after reading earlier BBYET-143 papers, so topics that return, such as Vavilov and Southern blotting, are written in a form you can reuse.
8. Solved File Index with the BBYEL 144 Practical Link
The full file answers all 7 questions of the June 2026 paper; 2 are shown on this page and 5 are in the full file only.
| Question | What it asks | Marks | Unit | Where the answer is |
|---|---|---|---|---|
| Q1 | Five botanical names and five biotechnology blanks | 10 | Units 7, 8, 9, 11 to 14 | Full file |
| Q2 | Vavilov's centres; top-down and bottom-up domestication genetics | 7 + 3 | Unit 1 | Sample 1 above |
| Q3 | Morphology of two cereals; health benefits of tea types | 6 + 4 | Units 2, 5 | Full file |
| Q4 | Micro-propagation flow-chart; embryo culture uses | 5 + 5 | Unit 12 | Sample 2 above |
| Q5 | Ti plasmid with labelled diagram; uses of recombinant DNA | 5 + 5 | Unit 14 | Full file |
| Q6 | GMOs and biosafety rules; biotechnology in floriculture | 2 + 4 + 4 | Unit 15 | Full file |
| Q7 | Short notes: RFLP, protoplast culture, genetic erosion, wood, Southern blotting | 4 × 2½ | Units 1, 9, 11, 13 | Full file |
BBYET-143 has a practical partner, BBYEL-144 Economic Botany and Biotechnology Laboratory, with its own lab manual. The lab exercise on wheat and rice specimens feeds straight into Question 3(a), so students who kept a neat record can reuse their observations in the theory exam. The solved file covers the theory paper only.
9. Programmes That Include BBYET 143
BBYET-143 is offered in IGNOU's Bachelor of Science (General), BSCG, as a Discipline Specific Elective in Botany.
On eGyanKosh the course sits in the BSCG Discipline Specific Elective basket for Botany, next to BBYET-141 Cell and Molecular Biology. Students usually take it after the core Botany courses such as BBYCT-137 Plant Physiology and Metabolism. See our Bachelor of Science (General) page for the full course list.
Because it is an elective, BBYET-143 is taken together with its lab course BBYEL-144. Both must be cleared for the elective's credits to count, so plan your theory and practical preparation in the same term.
10. How to Get the Full Solved Question Paper
Message 9899436384 on WhatsApp with "BBYET 143 June 2026" to get the complete solved file with answers to all 7 questions.
The full file gives you the 5 answers not shown on this page, Questions 1, 3, 5, 6 and 7, plus both samples in their final layout. That includes the labelled Ti plasmid figure, all five short notes in Question 7 so you can choose your four, and every one-line answer from Question 1.
How it works: send the message, our team replies with the price and payment options, and the PDF is shared on WhatsApp once payment is confirmed. The same number handles any question you have about the file.
11. BBYET 143 Economic Botany FAQs
Quick answers to what students ask most about the BBYET-143 June 2026 solved paper.
What does the Solved Question Paper June 2026 include?
It includes complete answers to all 7 questions of the June 2026 BBYET-143 paper, from the compulsory botanical names and fill-in-the-blanks in Question 1 to the four short notes in Question 7. Each answer follows the marks printed on the paper, with labelled diagrams and flow-charts where a question asks for them. Two answers, Question 2 and Question 4, are shown on this page as samples.
How do I get the full answers on WhatsApp?
Send a WhatsApp message to 9899436384 with the course code BBYET 143 and the session June 2026. Our team replies with the price and payment options, and the complete solved file is shared as a PDF once payment is confirmed. It contains answers to all 7 questions of the paper, which means the 5 questions not answered on this page plus the 2 samples shown here.
Which questions are solved on this page?
Question 2 and Question 4 are solved in full on this page. Question 2 covers Vavilov's centres of origin and the top-down and bottom-up approaches to the genetics of domestication, worth 10 marks together. Question 4 covers micro-propagation with a flow-chart and the applications of embryo culture, also 10 marks. Questions 1, 3, 5, 6 and 7 are listed as printed, with answers only in the full file.
How many questions do I attempt in the BBYET 143 exam?
You attempt five questions. Question 1 is compulsory and carries 10 marks, split into five botanical names and five fill-in-the-blanks. You then choose any four from Questions 2 to 7, each worth 10 marks, making 50 marks in 2 hours. That leaves about 24 minutes per question including reading time, so long answers must stay close to the marks.
Which BBYET 143 topics repeat?
In the two official IGNOU papers we compared, June 2022 and June 2026, eight topics came back. Vavilov's centres of origin, cereal morphology, botanical names, wood, the carbon source in culture media, tissue culture applications, GM crop biosafety and Southern blotting appeared in both. Two papers is a small sample, so treat this as a strong revision hint rather than a guarantee.
Who writes and checks the BBYET 143 answers?
The answers are written by Prateek Talwar's subject team and reviewed by Sheetal Kirola at Unnati Educations. Botanical names, marks splits and diagram labels are checked against the IGNOU block books and the printed June 2026 paper before the file is released. If a fact cannot be traced to the course blocks or a standard botany reference, it stays out of the answer.
Does BBYET 143 have a practical paper?
Yes. BBYET-143 is the theory half of the Botany elective, and its practical partner is BBYEL-144 Economic Botany and Biotechnology Laboratory, which has its own lab manual on eGyanKosh. Lab work such as studying wheat and rice specimens directly supports theory questions like Question 3(a) on cereal morphology. This solved file covers the BBYET-143 theory paper only, not the BBYEL-144 practical record.
Is the study material title different from the exam paper title?
Yes, slightly. The June 2026 exam paper prints the course as Economic Botany and Biotechnology, while the self-learning material on eGyanKosh is titled Economic Botany and Plant Biotechnology. Both refer to the same 4-credit course with 4 blocks and 15 units. Use the block books for depth, and use the solved paper to see how that content is trimmed to exam length.
12. Who Wrote and Checked the BBYET 143 Answers
The BBYET 143 answers were written by Prateek Talwar's subject team and reviewed by Sheetal Kirola.
Prateek Talwar, founder of Unnati Educations, leads the IGNOU science solved-paper series and prepares answers from the course blocks and the official term-end paper. Sheetal Kirola, Academic Head (M.Ed.), checks botanical names, marks splits and diagram labels against the block books and the printed paper before release.