When animals and plants die, microorganisms, fungi, and insects are responsible for decomposition. these organisms also respire. show an arrow on the diagram to indicate respiration by decomposers. scientists are concerned that melting glaciers are exposing long-frozen animals. when the ice melts, the animals thaw and begin to decompose. how will this affect the amount of co2 in the atmosphere?
answer me fast

CO2 increases.

Explanation: Organisms are decomposed by bacteria. When organisms die, Carbon Dioxide is released into the atmosphere or water.

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: