Which describes primary succession, but not secondary succession? a. Small trees and shrubs replace grasses and other small plants.
b. Large trees replace small trees and shrubs.
c. The process often begins on lifeless, barren rocks that form from a
volcanic eruption
d. The process often begins after a human disturbance, such as clear-cutting a
forest

Which disturbance would result in primary succession?

harvesting wheat by using a combine harvester at the end of the growing season

controlled burning to stimulate the growth of forest trees such as sequoia

the formation of Surtsey, a volcanic island off of the southern coast of Iceland **

the effect of a large herd of elephants on the grasses and shrubs in an area

Explanation:

segmentation=endoskeleton=backbone=coelom=tissues

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: