Which statement is not true? a. many chinese immigrants to build railroads in the united states. b. native americans probably came from eastern asia thousands of years ago. c. most african americans chose to come to the united states to find economic opportunities. d. english colonists settled originally on the atlantic coast and built businesses and farms.

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

i hope this

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.