Engelmann illuminated a strand of algae with a spectrum and counted aerobic bacteria along its length.
The action spectrum (rate of photosynthesis) most closely resembles which absorption spectrum?
- A
Carotenoids alone
- Bcheck_circle
The combined absorption of chlorophylls and accessory pigments
- C
Water absorption
- D
Hemoglobin
Explanation
The action spectrum tracks the wavelengths that drive photosynthesis. It closely matches the combined absorption of chlorophyll a, b, and accessory pigments, supporting their role in light capture.