Zadanie 1a
Calculate the percentage of Compact R dogs recorded as cases.
- Materiał graficzny
Biological calculations, statistics and graphs
Apply units, scales, ratios, percentages and rates; interpret variation, uncertainty, error bars and correlations; choose and interpret statistical tests and biological indices; construct suitable graphs, keys, food webs and pedigrees.
Tę umiejętność sprawdza 39 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 39 Otwórz w wyszukiwarce z filtrami
Zadanie 1b
Distinguish Standard Q from Compact Q in prevalence and median onset age.
- Materiał graficzny
Zadanie 1d
Identify the category with the greatest estimated mean risk in the graph.
- Materiał graficzny
Zadanie 1e
Calculate the difference in estimated mean risk between intact females and females neutered early.
- Materiał graficzny
Zadanie 1f
Compare and contrast the model risks for males and females.
- Materiał graficzny
Zadanie 1a
Describe changes in annual releases from 1964 to 2022.
- Materiał graficzny
Zadanie 1b
Calculate the number of birds released in 2020.
- Materiał graficzny
Zadanie 1d
Analyse the tree survey for trends in bark damage.
- Materiał graficzny
Zadanie 1c
The superimposed scales calibrate an eyepiece graticule. A young epidermal cell spans 65 graticule divisions at this magnification. Calculate its actual length in µm.
- Materiał graficzny
Zadanie 1a
(i) Identify the overall relationship between extract concentration and root length. (ii) Compare and contrast the effects on shoot height and above-ground biomass. (iii) Calculate the percentage change in total biomass from control to 12 mg mL⁻¹.
- Materiał graficzny
Zadanie 1b
(i) Identify the microbial activity at 12 mg mL⁻¹ after six days. (ii) Describe how microbial activity changes as extract concentration increases.
- Materiał graficzny
Zadanie 1c
Outline what the lower Simpson reciprocal index indicates about the soil community.
- Materiał graficzny
Zadanie 2a
Calculate the mean rate at which discs reach the surface in the hydrogencarbonate treatment over the whole run.
Zadanie 2c
An invented adult cohort gives the following associations with total blood cholesterol. Deduce conclusions supported by these results.
- Tabela do uzupełnienia
Zadanie 3a
(i) Identify the type of scale used on both axes. (ii) Suggest why these scales are useful here. (iii) Identify the overall relationship between diameter and conduction speed.
- Materiał graficzny
Zadanie 4a
(i) Identify the graph type. (ii) Estimate the concentration isotonic to this tissue.
- Materiał graficzny
Zadanie 4b
Compare and contrast the results at 0.75 and 1.00 mol L⁻¹.
- Materiał graficzny
Zadanie 4a
Identify the mean number of spots per fish under strong predation at month 21.
- Materiał graficzny
Zadanie 1g
Calculate the percentage increase caused by S in non-dormant embryos.
- Materiał graficzny
Zadanie 1b
(i) Calculate the percentage decrease in crustaceans consumed by males in mixed-prey trials relative to single-prey trials. (ii) Deduce which sex has the more flexible prey choice, giving a reason. (iii) Using the available data, justify the conclusion that…
- Materiał graficzny
Zadanie 1a
Calculate the decrease in the control group between weeks20 and80.
- Materiał graficzny
Zadanie 3a
(i) Describe the relationship shown. (ii) In a separate similar dataset, a fitted model gives R2 = 0.89. Comment on this result.
- Materiał graficzny
Zadanie 1b
Calculate the range of Tmax across the species.
- Materiał graficzny
Zadanie 1e
Calculate the decrease in the mean overexpressing-fibroblast percentage in lesional tissue.
- Materiał graficzny
Zadanie 3c
Calculate the difference between the temperatures of maximum measured respiration.
- Materiał graficzny
Zadanie 14
A reserve plans repeated quantitative surveys of a plant community. Suggest methods for detecting changes in its biodiversity over time.
Zadanie 1e
Calculate the largest overall increase in mean body mass during the dietary trial.
- Materiał graficzny
Zadanie 5
The two model traces show one resting respiratory cycle. (i) State the tidal volume. (ii) Calculate the ventilation rate. (iii) Explain how thoracic muscles produce the pressure change during the first second.
- Materiał graficzny
Zadanie 3c
Outline an advantage of seven replicates per treatment.
Zadanie 13b
Describe a method for measuring herbaceous-plant diversity at different distances from a road within a green space.
- Materiał graficzny
Zadanie 15b
Explain what the diversity-index values indicate about these ecosystems.
Zadanie 1b
An image of a plant cell has a stated magnification of180×. Its length on the image is27mm. Calculate the actual cell length in micrometres.
Zadanie 9b
A simulated observational study combines annual records from many hospitals over20years. It relates regional use of a hypothetical agricultural chemical H to reported health outcomes. The figures below are invented for evaluating evidence; they are not…
- Tabela do uzupełnienia
Zadanie 9
A constructed survey follows weeds resistant to herbicide H after resistant crops become widely used. The chart gives cumulative confirmed species counts. (i) Identify the year with the greatest number of newly recorded resistant species across all regions.…
- Materiał graficzny
Zadanie 14a
Calculate the increase in germination success after gut passage compared with partial pulp removal, in percentage points.
- Materiał graficzny
Zadanie 15
A hypothetical survey includes4860adult women. The table reports the percentage in each supplied body-mass category with each chronic condition. These constructed data are for interpreting observational evidence, not clinical estimates. Evaluate the evidence…
- Tabela do uzupełnienia
Zadanie 3a
Calculate the increase from 1885 to 2015.
- Materiał graficzny
Zadanie 1c
Calculate the expected number of true-bug species remaining after one year from an initial 90 000 species, using the model mean decline.
- Materiał graficzny
Zadanie 1f
Calculate the mass of lipid consumed on the 4:1 diet.
- Materiał graficzny