3.1

Question 1

natural selection (darwin)

Answer 1

The process that makes change possible in living

things

Question 2

adaptive radiation

Answer 2

e the change from a common ancestor into a number of different species that “radiate out” to inhabit different niches.

Question 3

Ecological succession

Answer 3

the term scientists use to refer to changes that take place over time in the types of organisms
that live in an area :primary
succession and secondary succession.

Question 4

Ecological succession Primary successsion

Answer 4

occurs in an area where no soil exists, such as on
bare rock (volcano. Then slowly soil apears in different ways In time, soil slowly accumulates, a
process that may take hundreds of years in some locations

Question 5

Pioneer species

Answer 5

the term scientists use to describe the lichens and
other plants that are the first organisms to survive and reproduce in an area. They change the abiotic and biotic organisms in many way

Question 6

Ecological succession secondary succession

Answer 6

occurs when there is still some stuff left over (forest fire,house is demolished , much faster then primary successsion

Question 7

Flooding

Answer 7

Flooding occurs in coastal areas, rivers, and lakes, when the volume of water exceeds the ability of the water body to contain it. Flooding can result in soil erosion and soil pollution if toxic chemicals are
present in floodwaters. Flooding can also cause widespread disease among humans when toxins or harmful bacteria from untreated sewage

Question 8

Tsunamis

Answer 8

Huge wave massive destruction, puts alot of salt on the soil which causes no plant growth

Question 9

Drought

Answer 9

Drought usually occurs when there is a below-average amount of precipitation in an area over a period of many months or years. Usally the eco system recovers from the drought when it rains