Examine the following list of questions. 1. Why are kids afraid of ghosts? 2. Should I feed the raccoons that visit my trash can? 3. How does mouse color affect mouse survival? 4. Does a mother duck love her babies? Which statement correctly identifies the scientific question and describes why the question is scientific? Question 1 refers to the supernatural. Question 2 reflects a moral or social value. Question 3 leads to a hypothesis that can be tested. Question 4 reflects a question that can’t be observed.

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.

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