Cambridge Secondary (7-9). Stage 7. Science. Learner's Book - Unit 7: Microorganisms in the environment - Question 55

Yeast is a single-celled organism that grows on fruit, such as grapes. Yeast feeds on sugar in the grapes. It breaks down the grapes and makes them rot.

Which sentences about yeast are correct?

A Yeast is a producer.

B Yeast is a decomposer.

C Yeast is a microorganism.

D Yeast is a virus.