Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

Which of the following is an example of an animal-like protist?

1. Algae

2. Slime mold

3. Protozoa

4. Fungi

The correct answer is: Protozoa

Animal-like protists, also known as protozoa, are a diverse group of eukaryotic microorganisms that share certain characteristics with animals, such as the ability to move and consume other organisms for nourishment. Protozoa are defined by their motility and heterotrophic lifestyle, relying on other organisms for food, which aligns with the traits typically associated with animals. In contrast, algae are primarily photosynthetic organisms that produce their own food (autotrophic) and are classified as plant-like protists. Slime molds are also distinct as they exhibit properties of both protists and fungi, often decomposing organic matter rather than consuming living organisms. Fungi are another separate kingdom entirely, functioning in a different ecological role primarily as decomposers. Thus, the classification of protozoa as animal-like protists highlights their unique characteristics that align closely with the kingdom Animalia.