Here's why:

* Mixotrophic organisms are able to obtain nutrients through both autotrophic and heterotrophic means.

* Autotrophic means they can produce their own food through processes like photosynthesis (using sunlight) or chemosynthesis (using chemical reactions).

* Heterotrophic means they obtain food by consuming other organisms or organic matter.

Examples of mixotrophic organisms include:

* Euglena: These single-celled protists have chloroplasts and can photosynthesize like plants, but they can also consume other organisms.

* Some bacteria: Some bacteria can switch between using sunlight for energy and consuming organic matter.

* Some fungi: Some fungi can absorb nutrients from dead organisms but can also trap and digest small organisms.

Important Note: While mixotrophic organisms can be single-celled, they can also be multicellular. The key characteristic is their ability to use both autotrophic and heterotrophic methods for nutrition.