Question

In which two locations can primary succession occur?

a) Bare rock exposed by a retreating glacier
b) Abandoned agricultural fields
c) Urban areas with established buildings
d) Desert sand dunes

Answer 1

Primary succession can occur in two locations: bare rock exposed by a retreating glacier and desert sand dunes. Pioneer species help break down the rock into soil, allowing other species to grow and gradually replace the pioneers.

Step-by-step explanation:

Primary succession occurs in two locations: a) Bare rock exposed by a retreating glacier and d) Desert sand dunes. In both cases, the ecosystem starts with bare rock devoid of life. Weathering and natural forces break down the rock, allowing pioneer species like lichens and hearty plants to establish. These pioneer species further break down the rock into soil where less hardy but competitive species will eventually grow and replace the pioneers.