PTE Listening

Multiple Choice, Single Answer

1 questions. Answer them all, then submit once for your section score.

Pearson Test of English — TestDayTwin Practice

1 of 1Time Remaining00:06:00

Listen to the recording and answer the question.

Based on the lecture, why do the professor say coral polyps expel their symbiotic algae during periods of heat stress?

To reduce competition for oxygen within the reef ecosystemTo protect their tissue from harmful compounds the overheated algae produceTo attract new species of algae better suited to warmer waterTo conserve energy during periods of reduced food availability