7. the analysis of water in a lake or stream depends upon more than one field of science or
body of knowledge. suppose you stumble across a portable water-testing lab on a riverbank,
and you find two testing stations: (1) a package of ph (acid/base) test strips and a digital
thermometer; and (2) a light microscope and glass slides. but you find no scientists. match
each testing equipment station to the field of science to which it belongs, and hypothesize
what is being tested in each station. (6 points)

cats ; snakes

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:

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

the answer is sex-linked recessive.