Twin studies document similarities and differences between twins. when two twins raised under very circumstances display similar personality traits, that suggests a strong influence on personality. critics of twin studies suggest that some documented similarities between twins are based on the fact that the twins are still the same age and may have some because of it.

The correct answers are: "identical", "different", "genetic", and "coincidental"

Explanation:

Twin studies are helpful to investigate the degree of influence that inheritance and environmental factors have in traits such as personality. Two identical twins raised under very different circumstances are very interesting cases of study, because if they show similar personality traits it would suggest that genetic plays an important role in the development of personality. However, critics of twin studies argue that identical twins obviously are the same age, therefore it could be coincidental that they could share some personality traits.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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