The immune response is the combined work of specialized cells that neutralize or destroy __________ in the body.

Correct Answer: D

Rationale: The correct answer is D, antigens. Antigens are substances recognized by the immune system as foreign, triggering an immune response to neutralize or destroy them. In this context, T cells and B cells are specialized cells of the immune system that respond to antigens, but they are not the substances being neutralized or destroyed. Telomeres, on the other hand, are protective structures at the end of chromosomes and are not targeted for neutralization or destruction by the immune system.

Correct Answer: D

Rationale: Erikson's theory of psychosocial development states that during adolescence, individuals face the conflict of identity vs. role confusion. If this conflict is resolved negatively, adolescents experience role confusion. Role confusion occurs when adolescents fail to develop a clear sense of identity, leading to uncertainty about their future roles. Choices A, B, and C are incorrect because they correspond to earlier stages of Erikson's stages of psychosocial development (mistrust corresponds to infancy, isolation to early adulthood, and inferiority to middle childhood), not adolescence.

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: A

Rationale: Brain growth is especially dramatic during the first year of life when the brain more than doubles in size. This period is characterized by rapid neural development and growth. The brain doesn't double in size during the second year, making choice B incorrect. Middle childhood and adolescence do not represent periods where the brain more than doubles in size, making choices C and D incorrect, respectively.

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: B

Rationale: The correct answer is 'Successful.' Successful aging encompasses achieving desirable outcomes and coping effectively with life's challenges and losses. 'Optimal' could imply a focus solely on achieving the best outcomes without considering challenges and losses. 'Peerless' means unmatched or unrivaled, which does not address coping with challenges. 'Capital' is related to wealth or assets and is not suitable in the context of aging and coping with life's difficulties.

Correct Answer: A

Rationale: The information-processing perspective focuses on how individuals process, store, and retrieve information. Choice A, 'examines separate aspects of thinking,' accurately reflects this perspective. The other choices are incorrect. Choice B is incorrect because the information-processing perspective does consider biological influences on cognitive development. Choice C is incorrect as this perspective is not limited to children in cultures with formal schooling. Choice D is incorrect as the information-processing perspective does not focus on overall cognitive change, but rather on the specific processes involved in information processing.

Correct Answer: A

Rationale: The correct answer is A, gene-environment interaction. This concept highlights that genetic factors play a role in how individuals react to environmental factors. Niche-picking (choice B) refers to the tendency of individuals to select environments that complement their genetic predispositions, not the inherent genetic differences in responsiveness. Passive correlation (choice C) involves the association between the genetic makeup of parents and the environment they provide for their children, not individual differences in responsiveness. Evocative correlation (choice D) relates to the idea that an individual's genetic traits can elicit certain responses from others in the environment, rather than individual differences in responsiveness.