Development is best understood as __________.

Correct Answer: D

Rationale: The correct answer is D. Development is best understood as a series of complex exchanges between nature (genetic factors) and nurture (environmental influences). This perspective emphasizes the interaction and interplay between genetic predispositions and environmental experiences in shaping an individual's development. Choices A and B are too extreme as they suggest that development is solely determined by genetics or solely influenced by the environment, which is not the case. Choice C is incorrect as development is not viewed as an unsolvable puzzle but rather as a dynamic process influenced by multiple factors.

Correct Answer: D

Rationale: In cognitive-developmental theory, a scheme is an organized way of making sense of experience. This term refers to mental structures or frameworks that help individuals interpret and understand the world around them. Choice A is incorrect because schemes are developed through interaction with the environment. Choice B refers to object permanence, a concept from Piaget's theory of cognitive development, not schemes. Choice C describes observational learning, which is different from the concept of schemes in cognitive development.

Correct Answer: C

Rationale: In females, the twenty-third pair of chromosomes is indeed labeled as XX. This pair of chromosomes determines the biological sex of females. Choice A, 'an autosome,' is incorrect as autosomes refer to the non-sex chromosomes. Choice B, 'dizygotic,' is incorrect as it relates to twins. Choice D, 'XY,' is incorrect as it represents the chromosome pair found in males.

Correct Answer: D

Rationale: The correct answer is 'social referencing.' Social referencing is a behavior where infants seek emotional information from a trusted person, usually a caregiver, to determine how to respond in uncertain situations. This process helps infants regulate their emotions and behaviors based on the cues they receive from the trusted individual. Choices A, B, and C are incorrect because self-control, give-and-take, and emotional self-regulation do not specifically involve seeking emotional information from others in uncertain situations, as social referencing does.

Correct Answer: A

Rationale: Correct answer: Developmental science is interdisciplinary because it integrates knowledge from multiple fields like psychology, biology, and sociology. The term 'empirical' refers to information gained from observation or experimentation, which is not the focus of this question. 'Applied' and 'theoretical' do not capture the essence of developmental science requiring inputs from various disciplines.