Phytoplankton Classification and Culture

What is the primary role of phytoplankton in the marine food chain?

• Decomposing organic matter

• Producing oxygen through photosynthesis

• Serving as the base of the food chain

• Providing shelter for marine organisms

Which of the following phytoplankton genera belongs to the class Bacillariophyceae?

• Tetraselmis

• Skeletonema

• Rhodomonas

• Chlamydomonas

Phytoplankton species are classified based on size. Which category includes species between 5-50 µm?

• Macroplankton

• Nannoplankton

• Microplankton

• Picoplankton

Which cultivation method involves microalgae growing using both light and organic carbon sources?

• Autotrophic cultivation

• Heterotrophic cultivation

• Mixotrophic cultivation

• Phototrophic cultivation

Which factor is NOT considered an important parameter for microalgal culture?

• Temperature

• Salinity

• Oxygen concentration

• Light intensity

Which of the following statements about heterotrophic cultivation is true?

• It requires only light and CO₂ for growth.

• It uses organic carbon sources instead of photosynthesis.

• It is less efficient than autotrophic cultivation.

• It is mainly used for wastewater treatment.

What is the optimal temperature range for phytoplankton culture?

• 10-15°C

• 16-27°C

• 28-35°C

• 36-40°C

Which of the following is a major genus used in aquaculture as a food source?

• Monochrysis

• Chaetoceros

• Pyramimonas

• Xanthophyceae

What is the role of aeration in microalgae culture?

• To provide additional nutrients

• To prevent sedimentation and improve gas exchange

• To increase salinity levels

• To control light intensity

Which of the following nutrients is NOT included in Guillard's f/2 medium?

• NaNO₃ (Sodium Nitrate)

• K₂HPO₄ (Dipotassium Phosphate)

• Fe₂O₃ (Iron Oxide)

• MgSO₄·7H₂O (Magnesium Sulfate)