In the domain Eukarya, what key feature do fungi and animals share that distinguishes them from plants?

• A. They are prokaryotic organisms lacking a nucleus
• B. They have cell walls composed primarily of cellulose
• C. They are heterotrophs that obtain carbon from organic compounds rather than performing photosynthesis
• D. They contain chloroplasts for photosynthesis

Answer: (C)

Verified step by step guidance

1. Identify the domain Eukarya, which includes organisms with cells that have a true nucleus and membrane-bound organelles.
2. Recall that fungi and animals are both heterotrophic, meaning they obtain their carbon and energy by consuming organic compounds rather than producing their own food through photosynthesis.
3. Contrast this with plants, which are autotrophic and contain chloroplasts to perform photosynthesis, producing their own organic compounds from carbon dioxide and sunlight.
4. Note that fungi have cell walls, but these are made of chitin, not cellulose, which is the primary component of plant cell walls.
5. Conclude that the key shared feature distinguishing fungi and animals from plants is their heterotrophic mode of nutrition, relying on organic compounds rather than photosynthesis.