The presence of ____________ indicates that the air is healthy for humans to breathe.

Name: The presence of ____________ indicates that the air is healthy for humans to breathe.
Brand: Quizplus
Rating: 4.8 (41 reviews)

Question

Quizplus · Accepted Answer

Lichens are symbiotic organisms that require clean air to grow. Their presence indicates that the air is relatively free from pollutants, making it healthy for humans to breathe. Ergot, yeast, mycorrhizae, and smuts are not reliable indicators of air quality.

The Presence of ____________ Indicates That the Air Is Healthy