Identical twins who have separate placentas are somewhat less similar than identical twins who share a placenta. This best illustrates the influence of ________ on development.

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Identical twins who share a placenta have a more similar prenatal environment, as they are receiving nutrients and oxygen from the same source. Identical twins with separate placentas may have slightly different prenatal environments, which could impact their development and make them less similar. This demonstrates the influence of prenatal environments on development. Genetic predispositions, gender schemas, and natural selection are not directly related to this observation about identical twins' development.

Identical Twins Who Have Separate Placentas Are Somewhat Less Similar