BIO2030 Food Security in a Changing World
The Complete Study & Assessment Guide · S2 2026BIO2030 Overview
- Monash University
- S2 2026
- 13 chapters
- Biology
BIO2030 Food Security in a Changing World is Monash University's second-year unit on why the world's food supply is difficult to secure and what plant science can do about it.
- Assessed by Assignment 1: Laboratory report 35% · Test 1 and Test 2, in class 25% + 2 more
- Key terms Food security, Relative growth rate, Harvest index, Sink capacity
- Assessment move Treat BIO2030 as a unit you keep up with rather than one you revise for…
- Most asked Does this unit end with an examination?
How BIO2030 is assessed
| Component | Weight | Format |
|---|---|---|
| Assignment 1: Laboratory report | 35% | Individual written report of 1000 words excluding figure captions, tables and references, on your own weeks 2 to 5 growth-experiment data. Three figures required, including at least one growth index and at least one physiological parameter. Submitted as a PDF; marking stops at the word limit. Due Sunday 13 September 2026. |
| Test 1 and Test 2, in class | 25% | Two closed-book Moodle quizzes worth 12.5 per cent each, 30 minutes and one attempt, held in your allocated laboratory class. Test 1 (Tuesday 1 September 2026) covers weeks 1 to 5 with printed data to analyse; Test 2 (Tuesday 20 October 2026) covers Theme 2 from week 6 onward. |
| Assignment 3: Poster, design a crop improvement program | 20% | A1-sized poster, individual or in a partnership of two, with five required sections and at least five references. Marked against ten criteria totalling 20 marks. Due Sunday 4 October 2026 for the undergraduate code. |
| Assignment 4: Group presentation | 20% | Group presentation with slides uploaded; group and topic must be chosen by the end of week 8. The postgraduate code takes an individual journal-article review instead, with a different deadline. Slide upload due Monday 12 October 2026. |
What BIO2030 covers
The whole unit as one map. Eleven teaching chapters across three themes, from plant growth measurement through crop genetics to the ethics of the food system, plus two chapters that take the assessed components apart against the published marking criteria. Each links to its free chapter guide.
Defining Food Security and the Global Challenge
Theme 1 · Week 1. The four components of food security, hidden hunger, the Green Revolution and the environmental bill agriculture runs up.02Plant Growth, Biomass Partitioning and Growth Indices
Theme 1 · Week 2. Relative growth rate, specific leaf area, leaf area ratio, root to shoot allocation and harvest index.03Photosynthesis, Source and Sink, and Rising Carbon Dioxide
Theme 1 · Week 3. Where carbon is fixed, how assimilate moves, and why sink capacity limits the response to elevated carbon dioxide.04Water Movement Through Plants and Growing in Dry Places
Theme 1 · Week 4. The water potential gradient, the stomatal trade, and what drought does to yield.05Plant Nutrition and the Nutritional Quality of Food
Theme 1 · Week 5. Macronutrients and micronutrients, mobile against immobile elements, and nutrient dilution under a warmer atmosphere.06Genetic Variation and How New Crop Varieties Are Made
Theme 2 · Week 6. The four sources of useful variation and the four routes from variation to a released variety.07Detecting Genetic Modification: DNA Extraction and PCR
Theme 2 · Week 7. Reagents, the thermal cycle, primer design, gel reading and the controls that make a result reportable.08Crop Improvement, Management Practice and Policy
Theme 2 · Week 8. Genotype by environment interaction, reaction norms, best management practice, policy levers and the pathogen resistant banana case.09The Ecology of Food: Energy Flow and Trophic Levels
Theme 3 · Week 9. Food chains and webs, the ten per cent transfer, and the environmental, ethical and health cases for eating lower down.10Nutrition, Phenotypic Plasticity and Consumer Health
Theme 3 · Week 11. Nutritional geometry, intake targets, rules of compromise, reaction norms and how nutrition subverts pest control.11Sustainable Food Production and Environmental Ethics
Theme 3 · Weeks 10 and 12. Yield gaps, diet shifts and waste, the systems debate, the commons argument and the value taxonomy.12The Growth Experiment and the Laboratory Report
Assessment · 35 per cent. The weeks 2 to 5 experiment, the six marking criteria and the figures criterion that carries ten marks.13The Poster, the Presentation and the In-class Tests
Assessment · 65 per cent. Ten poster criteria, the fourth component that differs between the two unit codes, and two tests taken without notes.It is taught in three named themes: Theme 1 (weeks 1 to 5) is the plant physiology that decides how much a crop can produce, and it is also where you collect your own growth data; Theme 2 (weeks 6 to 8) is crop genetics, from where useful variation comes from to how a modification is detected in a real sample; Theme 3 (weeks 9 to 12) steps out to the food system, its energy budget, its nutritional consequences and the ethical arguments about how it should be run.
The unit runs simultaneously under a postgraduate code, and the two cohorts share one Moodle site.
The structural fact that changes how you should study it: there is no end of semester examination.
All four assessed components close between week 6 and week 12, and the largest is a report on data you collect yourself in weeks 2 to 5. That means there is no revision period to fall back on, and a missed laboratory session is a missing column in your own dataset rather than a missed hour of teaching.
Compare two nutrient treatments using relative growth rate, and say what the number means
- +1Write the formula and the interval before touching the numbers: relative growth rate = (ln W2 - ln W1) / (t2 - t1), with t2 - t1 = 21 days.
- +1Low nutrient: ln(1.62) = 0.482, ln(0.35) = -1.050. Difference = 1.532. Divide by 21 days = 0.073.
- +1High nutrient: ln(3.71) = 1.311, ln(0.38) = -0.968. Difference = 2.279. Divide by 21 days = 0.109.
- +1State the units: g per g per day, equivalently per day. A relative growth rate has mass in both the numerator and the denominator, so the mass units cancel.
- +1Justify the choice of measure: relative growth rate expresses new growth per unit of existing plant, so it compares plants that started at different sizes; a raw biomass difference would partly measure which treatment happened to have larger seedlings at the baseline harvest.
Key terms
- Food security
- The condition in which people have reliable access to sufficient, safe and nutritious food. The unit treats it as having several named components rather than as a single quantity, which is why a rise in total production does not automatically improve it.
- Relative growth rate
- New dry biomass produced per unit of existing dry biomass per unit time, calculated as the difference between the natural logarithms of biomass at two harvests divided by the interval between them, in grams per gram per day. It makes plants of different sizes comparable.
- Harvest index
- The mass of the harvested organ expressed as a fraction of total above ground biomass. It is the measure that explains why dwarf cereal varieties raised yield without necessarily raising total plant growth.
- Sink capacity
- The ability of a plant's non photosynthetic organs to accept and store assimilate. It is the term that decides how much a crop gains from elevated carbon dioxide, because extra fixed carbon has to be deposited somewhere.
- Phenotypic plasticity
- The capacity of an organism to shift its phenotype as the environment around it changes. It is a trait in its own right, controlled genetically and environmentally, and it is measured as the slope of a reaction norm.
- Genotype environment interaction
- The third term in the phenotype equation, capturing how differently genotypes respond to the environment. Where it is large, the best variety at one site is not the best variety at another, so a recommendation without a region attached is incomplete.
BIO2030 FAQ
Does this unit end with an examination?
No. The unit publishes four assessed components with weights summing to 100 and there is no examination row: a laboratory report at 35 per cent, two in-class tests grouped as 25 per cent, a poster at 20 per cent and a group presentation at 20 per cent.
The last component closes in week 12. Students who plan around an end of semester revision period find that the largest component was already due in week 7, and that the material for the first test stopped being revisable in week 6.
What are the two in-class tests like?
Each is a Moodle quiz held during your allocated laboratory class, worth 12.5 per cent, limited to 30 minutes, with one attempt and a password. They are taken without notes, with laptop only, and no phones, artificial intelligence tools or talking are permitted. You are given printed data to analyse and submit answers online, so at least part of each test is calculation or interpretation rather than recall.
Test 1 sits in week 6 and covers weeks 1 to 5; Test 2 sits in week 12 and covers Theme 2 from week 6 onward. The worked examples the unit names for the first test are harvest index and growth rate working from week 2.
How much of the laboratory report mark is in the figures?
Ten of the 35 points, which is the same as the discussion and by far the best return per word written, since the figures criterion is satisfied largely in captions. The entry condition for the top band is a conjunction: at least one growth index and at least one physiological parameter must be shown. Three figures are required, two on growth and biomass and one physiological.
This criterion also has a sixth band above exemplary, worth the tenth mark, which asks only for consistency: one style across all figures, one font size, one line thickness.
Why does my fourth assessment look different from a classmate's?
Because the unit runs under two codes on one Moodle site. The undergraduate stream gives a group presentation with slides uploaded; the postgraduate stream writes an individual 2000 word review of a journal article, and discussion with others on that task is treated as collusion. Both are worth 20 per cent.
The poster deadline also differs between the two codes by about a week, so check the code at the head of every task page before acting on a date.
How much mathematics does this unit involve?
Very little, but the little there is carries marks. You calculate growth indices from your own harvest data, all of which are ratios: relative growth rate uses natural logarithms of biomass at two harvests divided by a fixed 21 day interval, and specific leaf area, leaf area ratio and root to shoot ratio are single divisions.
One ecology calculation appears in Theme 3, where the energy available at the top of a food chain is one tenth raised to the power of the number of transfers. There is no calculus and no statistics requirement; statistical analysis is optional in the laboratory report.
What is the single most useful planning fact about this unit?
That each component draws on a stated block of teaching, so you can see when a week stops being revisable. Test 1 covers weeks 1 to 5 and sits in week 6. The laboratory report uses data you harvested in weeks 2 and 4 and is due in week 7, the same week as the genetic modification laboratory.
The poster is set on weeks 6 to 8 and closes in week 10. Group formation for the presentation closes at the end of week 8. Test 2 covers week 6 onward and sits in week 12.
How to prepare for the assessments
Treat BIO2030 as a unit you keep up with rather than one you revise for, because nothing is decided at the end of semester and every component closes while the next one is being taught. Attend the weeks 2 to 5 laboratories without exception: they produce the numbers for the 35 per cent report, and a missed session is an irrecoverable gap in your own dataset rather than a missed hour of content.
Learn the five growth index formulae with their units early, and rehearse them on your own numbers until the units come out right without checking, because Test 1 hands you printed data and 30 minutes. For Theme 2, practise one move repeatedly: given a stated problem, choose one of the four routes to a new variety and defend it against the other three by the shape of the change required.
That is the reasoning the poster rewards, it is what Test 2 asks, and it is the same move the pathogen resistant banana case works through. For Theme 3, argue from named sources rather than from a blended consensus, because the readings deliberately disagree about where the binding constraint sits.
Finally, read the two assessment chapters twice, once when each task is set and once the day before you submit, since most of the losses in this unit are procedural: an over length report stops being marked, an unsigned group blocks submission entirely, and a poster with no country named cannot reach the top band of the policy criterion.
Your AI Biology tutor for BIO2030
Stuck on a hard BIO2030 question? Sia is AskSia’s AI Biology tutor — ask any BIO2030 Food Security in a Changing World question and get a clear, step-by-step explanation grounded in how the course is actually taught and assessed. Read this whole study guide free, then take your hardest questions to Sia.
