Which kingdom is best described as multicellular organisms with cellulose-based cell walls and energy from photosynthesis?

• A. Protista
• B. Fungi
• C. Plantae
• D. Animalia

Answer: (C)

Plants are multicellular eukaryotes that carry out photosynthesis to obtain energy and have cell walls made of cellulose. These traits together define the group Plantae. Fungi also form many multicellular organisms but have cell walls made of chitin and rely on absorbing nutrients rather than photosynthesizing. Animals lack cell walls altogether and obtain energy by consuming other organisms. Protista is a diverse collection; some members are photosynthetic, but not all have cellulose walls or rely on photosynthesis as their main energy source. So the combination of cellulose-based cell walls and photosynthetic energy production best describes Plantae.