Refer to the Table

question 138

Multiple Choice

Refer to the table.In mice, a single-gene mutation can lead to obesity.The Ob gene codes for the protein leptin.The recessive ob allele is a loss-of-function allele, so ob/ob mice do not produce leptin, and they become obese.In an experiment, leptin was injected into ob/ob and Ob/Ob (wild-type) mice daily.The data in the table below were collected before the injections began (baseline) and 10 days later.(Assume that the Ob allele is dominant.) What conclusion can be drawn from the data in the table?

• A) The mutant mice gain more weight, but they do not eat more, than wild-type mice.
• B) Though a mutant mouse that is unable to produce leptin eats more than a wild-type mouse, injecting leptin causes the mutant mouse to eat normally.
• C) When leptin levels are increased above normal, a mouse eats less and loses weight.
• D) Metabolic rates are lower in wild-type mice than in mutant mice.
• E) Metabolic rates in mutant mice are negatively correlated with their body temperatures.

Understand the concept of cognitive scaffolding and its importance in child development.

Comprehend the stages of cognitive development as proposed by Piaget, including key characteristics and capabilities of each stage.

Identify and explain the development of theory of mind in young children.

Recognize the role of language and verbal self-regulation in cognitive development as highlighted by Vygotsky.

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Definitions:

U-Shaped Valley

A U-shaped valley is a type of valley characterized by its U-shaped cross-section, typically formed by the erosion caused by glaciers.

Glacier

A large, moving mass of ice formed by the accumulation and compaction of snow on mountains or near the poles.

Wind

Wind is the movement of air from areas of high pressure to low pressure, significantly influenced by the Earth's rotation, surface irregularities, and temperature differences.

River

A large natural stream of water flowing in a channel to the sea, a lake, or another river.