Economic success is related to IQ levels. This is the broad assumption in their work.
A. Incorrect. It is contradictory.
B & C Incorrect.
D. Incorrect. Takes into account other factors besides IQ.
Assesses genetic, environmental and maternal effects. It takes into account all the factors.
A. Incorrect. It has one factor missing.
C, D & E Incorrect. Because they concentrate on only one factor.
Other effects besides the "maternal effect" account for 80 percent of the
similarities between twins and 95 percent of the similarities between other siblings. These are other effects. The maternal effect accounts for 20% of the similarities according to the passage.
All other factors affect the uterine environment. The passage does mention the illicit use of drugs but not all illicit activities.
"Interventions aimed at improving the prenatal environment." These are deliberate measures taken to address the situation.
B, C & D Incorrect. There are some individual factors that could create a better maternal environment.
E. Incorrect. May not be relevant.
Non-identical twins are as genetically unlike as other siblings.
A. Incorrect. It is the fraternal twins who are raised together, who are more similar than other siblings.
B, D & E Incorrect.
A pair, two things that go together as do ‘genes and environment.’
A. Incorrect. Die hard is difficult to change.
B. Incorrect. Dyed-in-the-wool is someone who is fixed in his beliefs.
D. Incorrect. Banality is an ordinary, uninteresting remark.
E. Incorrect. An aphorism is a short saying that contains a grain of universal truth.