Question

When does primary succession occur?
A. After a farmer abandons his farm
B. After a forest fire burns down all the trees
C. After a glacier retreats leaving rock rubble behind
D. When a pond gradually fills in with organic matter and becomes a forest

Answer 1

D

Answer 2

IN CASE OF D THE PRIMARY SUCCESION KNOWN AS HYDROSERE.

Answer 3

Primary Succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited. In other words, it is the gradual growth of an ecosystem over a longer period.
In contrast, secondary succession occurs on substrate that previously supported vegetation before an ecological disturbance from smaller things like floods, hurricanes, tornadoes, and volcanic eruptions which destroyed the plant life. Answer is D

Answer 4

c*