Photosynthesis

Biologia IBPaper 1B, maj 2026, TZ2wzorowane3 pktotwarteśrednie (szac.)

Zadanie 2c

Explain why the two treatments give different results.

Biologia IBPaper 1A, maj 2026, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 4

A leaf extract is separated by chromatography. Which band has the greatest retention factor (R_f) in this run? A. The yellow-green band B. The blue-green band C. The orange band D. The yellow band

• Materiał graficzny

Biologia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 5

Three pigment absorption spectra from a model green leaf are shown. Which deduction is supported? A. Red illumination near 666 nm can supply energy for oxygen-producing photosynthesis B. The leaf must absorb every wavelength equally C. Green illumination near…

• Materiał graficzny

Biologia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 4

Temperature is held at 24 °C. At X on the lower curve, increasing which factor would allow a higher photosynthetic rate, as demonstrated by the other curve? A. Oxygen concentration B. Chloroplast number C. Carbon dioxide concentration D. Darkness duration

• Materiał graficzny

Biologia IBPaper 1A, maj 2025, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 5

A blue carbon-dioxide indicator becomes yellow when dissolved carbon dioxide accumulates. Identical sealed jars start blue. Which treatment is most likely to retain the blue colour if illumination is sufficient for net photosynthesis? A. An aquatic plant and a…

Biologia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 5

Which factors limit photosynthesis near100light units and on the lower curve near700units? A. 100: CO₂; 700: light B. 100: temperature; 700: light C. 100: light; 700: oxygen supply D. 100: light; 700: CO₂

• Materiał graficzny

Biologia IBPaper 1A, listopad 2025, TZ3wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 5

For this ordinary temperate plant, assume the optimum is above26°C and below45°C. Other factors remain suitable. Which extension towards70°C is most plausible? A. The rate increases without limit B. The rate immediately falls to zero at27°C and then rises C.…

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Biologia IBPaper 3, maj 2024, TZ2wzorowane2 pktotwarteśrednie (szac.)

Zadanie 2c

Suggest ecosystem changes that could follow an increase to850ppm.

• Materiał graficzny

Biologia IBPaper 3, maj 2024, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 3b

Suggest why growth in the tanks exceeds growth in the field.

• Materiał graficzny

Biologia IBPaper 1, maj 2024, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 7

Temperature is held constant while plants are tested at two light intensities. At 0.12% CO₂ under dim light, which change is supported as a way to increase photosynthesis by the results? A. Conclude that no environmental factor limits the rate B. Increase…

• Materiał graficzny