Which kingdom is primarily composed of multicellular, photosynthetic organisms with cellulose in their cell walls?

Which kingdom is primarily composed of multicellular, photosynthetic organisms with cellulose in their cell walls?

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

Answer: (D)

Plants are multicellular organisms that use sunlight to make their own food (photosynthesis) and have cell walls made of cellulose. This combination—multicellularity, autotrophic nutrition through photosynthesis, and cellulose-based cell walls—specifically characterizes the Plantae kingdom. Other groups differ: fungi have cell walls made of chitin and do not photosynthesize; animals lack cell walls and are heterotrophs; while some protists are photosynthetic, they are not predominantly multicellular organisms with cellulose walls. Therefore, the best match for the description is Plantae.

Plants are multicellular organisms that use sunlight to make their own food (photosynthesis) and have cell walls made of cellulose. This combination—multicellularity, autotrophic nutrition through photosynthesis, and cellulose-based cell walls—specifically characterizes the Plantae kingdom. Other groups differ: fungi have cell walls made of chitin and do not photosynthesize; animals lack cell walls and are heterotrophs; while some protists are photosynthetic, they are not predominantly multicellular organisms with cellulose walls. Therefore, the best match for the description is Plantae.