Question: Will weather changes (drought/flooding) over time cause changes in the beak depth of a bird population? 2. Evidence: What evidence in the data supports your claim? snapshot, data table, etc)

weather changes will effect drought and flooding because depending on how hot it is or how sautrated and moist it is it will be warmer or colder which will alter drought and flooding.

Explanation: because if it rains where there is drought it will not have drought anymore and where dose ran come from clouds which is weather which can change

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:

it would be c. xylem.