Studies of Identical Twins Have

question 63

Multiple Choice

Studies of identical twins have

• A)proved conclusively the importance of biological factors in human development.
• B)proved conclusively the importance of environmental factors in human development.
• C)proved conclusively that human development is a result of the interaction between environmental and biological factors.
• D)been based on extremely small samples and should be viewed as preliminary analyses at best.

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Definitions:

Bidirectional View

A perspective that considers mutual influences, suggesting that two variables or entities affect each other in both directions.

Conceiving a Child

The process by which a sperm fertilizes an egg, leading to the initiation of pregnancy.

Stigma

The portion of the carpel where pollen grains land during pollination (and before fertilization).

Style

The neck connecting the stigma to the ovary of a carpel.