Can anyone please help? Select all of the statements that describe a climax community.
A: a volcanic eruption causes lava to cool and form new rock.
B:an area of land recently formed by glacial retreat.
C: a farm once used to grow Cotten has been abandoned.
D: a forest fire burns the plant life in a forest ecosystem, leaving behind a rich layer of ash.
E:a beaver dam, once flooding a river basin, has been removed.
F: a lake forms after a retreating glacier.
G: a forest supports hardwood trees, squirrels, deer, and bears.

explanation:

1 rosales   order

2 eurarya   domain

3 rosaceae   family

4 cania - genus

5 plantae - kingdom

6 magnoliopsida - class

7 rosa - species

8 magnoliophyta - phylum

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

i have to report this, it doesn't relate to biology

b - the respond is innate and varies over time.

good luck!