Question

1. which kingdom has organisms such as algae that are unicellular, but complex?

fungi
plantae
protista
archaea

Explanation:

• Fungi: Fungi are mostly multicellular (e.g., mushrooms), and their unicellular forms (like yeast) have different characteristics from complex unicellular algae.
• Plantae: Plants in the kingdom Plantae are mainly multicellular. Even the simplest plants are not unicellular in the context of complex unicellular organisms like some algae.
• Protista: The kingdom Protista contains a diverse group of eukaryotic organisms. Many algae (e.g., diatoms, euglenoids) are unicellular but have complex cell structures, such as chloroplasts (for photosynthesis in some), and can perform various life - processes in a single - celled state.
• Archaea: Archaea are prokaryotes. They are simple in structure compared to the complex unicellular eukaryotic algae.

Answer:

C. Protista