The two species of snakes, the emerald tree boa and the boa constrictor, belong to the same genus; however, the former is tree dwelling and needs high humidity whereas the latter is terrestrial and requires a dry environment. what kind of the evolutionary mechanism was responsible for this?

if you are talking about current time the answer is no

if you are talking about when the colonies were developing the answer is yes

c, to compete

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.