Which is NOT a source of emerging diseases?
A. viruses “jumping" from animals to humans
B. pathogens developing antibiotic resistance
C. rapidly evolving viruses
D. vaccines against polio, diphtheria, and tetanus

D

Explanation: A and B and C are completely worg becasue developing resistance to antibiotics only strengthens the ailment and the current situation with coronaviris is becuase a virus went from bat to pangolin and the reason we dont overuse medicine is to keep ailments from evolving because then the cure is useless hope this helps god bless

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:

six grader is what i am ssorry