Answer:
Book 3
Explanation:
1,2 and 4 are all about specific cultures while 3 is about any culture.
Descriptive investigations involve collecting data about a system, but not making tests or experiments.
Making tests belongs to experimental investigations.
Descriptive investigations aim to draw conclusions from observations of the fenomena, while experimental investigations design tests that let the researcher to compare results on different conditions with a control situation.
There is also the so called comparative investigations which collect data from under different conditions but do not include the control situtation.
The correct answer is methylation.
This process refers to the addition of methyl groups to the DNA molecule, when the activity of such DNA segments is slightly altered. The more we age, the less methylation there is, which is why the genes of the elderly are different from those of young people.
The chief executive is part of the legislative branch
The answer would be E. With Ford's assembly line he need oil plants and all the natural resources he could find in order to make new cars and everyone needed gas to run all of these new cars that he was making
