Question

. Which of the following is an example of how taxon classification might change?

Ecologists determine that pesticide runoff affects one local fish species more than others.

A researcher updates his or her records when new behaviors are observed in chimpanzees.

Scientists have to update their count of Bald Eagles due to successful conservation efforts.

Scientists recognize a new sub-species of tiger based on newly discovered DNA patterns.

Answer 1

More generally, taxon is the classification of a group of organisms sharing common phylogenetic roots: i.e. a species, a genus, a clade (not necessarily phylogenetic), etc.

Here is a good list of all the big distinctions: http://en.wikipedia.org/wiki/File:Biological_classification_L_Pengo_vflip.svg

I think A is correct

B is incorrect: since behavior does not explicitly affect the classification of a group of organisms
C is incorrect: since population size is not relevant to a classification (unless it results in sexual segregation and speciation)
D is also incorrect: even though the newly found tigers are a sub-category of the other tigers, they should still be in the same taxon

A would be my best guess since this actually changes the form of the fish and likely a new taxonomic characterization would be necessary

Let me know if this makes sense