Of the Following Pairs of Twins, Which Pair Will Probably

question 7

Multiple Choice

Of the following pairs of twins, which pair will probably resemble each other the most with regard to their IQ scores?

• A) a pair of fraternal twins who always knew they were fraternal
• B) a pair of fraternal twins who mistakenly thought they were identical
• C) a pair of identical twins who mistakenly thought they were fraternal
• D) All three of these pairs will resemble each other to the same extent.

---

Definitions:

Denitrification

A microbial process occurring mostly in soil and aquatic environments, where nitrate is reduced and ultimately produces molecular nitrogen, removing it from the ecosystem.

Hydrologic Cycle

The water cycle, which includes evaporation, precipitation, and flow to the ocean; supplies terrestrial organisms with a continual supply of fresh water.

Nitrification

The conversion of ammonia (NH3) to nitrate (NO3-) by certain bacteria (nitrifying bacteria) in the soil; part of the nitrogen cycle.

Transpiration

is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.