In order to explain principles of the differences in intelligence between and within groups, the authors described a hypothetical tomato plant experiment. Based on this experiment it would be accurate to conclude that:
A) if differences within groups are at least partly genetic in origin, then differences between groups are also genetic.
B) the heritability differences between groups is 100% even though the within-group difference is due entirely to the environment.
C) the variation within each group will result from genetic differences, but the between-group difference is explained by the different care received.
D) heritability estimates are valid in regard to group differences, but not in regard to the variance found within a group.

Question

Quizplus · Accepted Answer

The tomato plant experiment shows that while genetic variation accounts for differences within groups, differences between groups can be explained by environmental factors such as different care received. Therefore, it is likely that genetic differences account for variation within each group, but the between-group difference is determined by environmental factors. This is consistent with the current scientific understanding of intelligence differences within and between groups.

In Order to Explain Principles of the Differences in Intelligence