Protozoa

• Single-celled organisms belonging to the eukaryotic domain (correct)
• Multi-celled organisms belonging to the prokaryotic domain
• Multi-celled organisms belonging to the eukaryotic domain
• Single-celled organisms belonging to the prokaryotic domain

• Asexually through binary fission or multiple fission (correct)
• Through conjugation and spore formation
• By budding and fragmentation
• Sexually through meiosis and fertilization

• They are important in nutrient cycling and as primary consumers in food chains (correct)
• Protozoa are not significant in ecological processes
• They mainly act as decomposers in ecosystems
• They are responsible for nitrogen fixation in soil