Kingdom Plantae consists of multicellular eukaryotes that produce their food by photosynthesis.

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

Answer: (A)

Plants are multicellular eukaryotes that carry out photosynthesis to make their own food. This combination—being multicellular and autotrophic through photosynthesis—defines the kingdom Plantae. They use chloroplasts with chlorophyll to convert light energy, carbon dioxide, and water into sugars, releasing oxygen in the process. Plant cells have cellulose cell walls and store energy as starch, which are additional plant-specific traits.

Fungi are multicellular but do not photosynthesize; they obtain nutrients by absorbing from their surroundings. Animals are heterotrophs that ingest or absorb preformed organic matter. Protista is a diverse group that includes many unicellular organisms, with some photosynthetic members, but they are not the multicellular photoautotrophs that characterize plants.