Single-celled organisms that are more similar to plants than animals can produce their own food through photosynthesis.

Here's why:

* Plants are autotrophs: This means they can make their own food using sunlight, water, and carbon dioxide through a process called photosynthesis.

* Animals are heterotrophs: They obtain food by consuming other organisms.

* Some single-celled organisms are autotrophs: These organisms, like algae, contain chlorophyll and can carry out photosynthesis, just like plants.

Therefore, these single-celled organisms share a key characteristic with plants, making them more similar to plants in terms of their mode of nutrition.