Which of the following was a significant challenge in building the panama canal? frequent rains caused rivers to flood. engineering plans did not work. workers went on strike to get extra pay. congress did not provide enough money.

The answer is A: Frequent rains caused rivers to flood. I just took the test.

The correct answer is - Frequent rains caused rivers to flood.

Panama is a country that has wet tropical climate. This basically means that the country is warm throughout all of the year, and also has rainfall throughout all of the year.

Now those are nice conditions for the nature, so the animals and plants thrive there, but it is not good at all for performing a large-scale construction project. The constant rains were making the terrain muddy all the time, and as if that was not bad enough, the rivers were flooding very often, and the construction had to be stopped, people evacuated, and after the floods, clean up the terrain again and continue with the work.

the correct answer is d: "party organizers, volunteers, voters, and elected officials."

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.