Which of the following scenarios represents change to an ecosystem bu which of the following scenarios represents change to an ecosystem brought about by biotic factors
a. a wildfire cause by lighting striking a tree. b.a flood caused by a severe storm. c. a land line d. a volcanos

The correct answer is option C, A land slide

The very common cause of landslide is the loosening of soils due to the human interventions and activities of construction, grazing or deforestation.

All these processes loosens the soil and thus make the mountains susceptible to land slide events.

Since all these events are caused by a biotic agent i.e human being it is called biotic ecosystem change

not too sure maybe olecranon process

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source: