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 percent 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 illustrates that genetic differences between plants within each group lead to variation, but the differences between groups are due to environmental factors (e.g. care received). This mirrors the idea that within-group differences in intelligence may be partly genetic, but between-group differences may be due to environmental factors such as education, nutrition, or cultural factors. Therefore, choice C is the best option as it accurately captures this analogy. Choices A, B, and D do not reflect this relationship between within-group and between-group differences.

In Order to Explain Principles of the Differences in Intelligence