Which Data Suggests the Strongest Link Between Heredity and Intelligence

question 11

Multiple Choice

Which data suggests the strongest link between heredity and intelligence?

• A) identical twins whose IQ scores correlate at the +0.9 level
• B) fraternal twins whose IQ scores correlate at the +0.9 level
• C) biological siblings whose IQ scores correlate at the +0.9 level
• D) adoptive siblings whose IQ scores correlate at the +0.9 level

---

Definitions:

Annual Interest Rate

The percentage rate charged on a loan or earned on an investment over the period of one year.

Debt-to-equity Ratio

This financial indicator reveals the relative amounts of debt and equity used by a company to support its asset base.

Issuing Bonds

The process by which a company or government borrows money from investors by selling bonds, a form of long-term debt where the issuer promises to pay back the principal along with interest.

Stock

An equity instrument representing ownership interest in a company, entitling the holder to a claim on the company's assets and earnings.