In an Experiment, It Was Found That Newborn Rats Who

question 202

Multiple Choice

In an experiment, it was found that newborn rats who were genetically predisposed to be calm and stress-resistant grew upto be nervous, high-strung, and easily stressed adult rats when raised by genetically unrelated, inattentive mothers. The explanation for these results was that:

• A)the rats' DNA changed because of their upbringing.
• B)epigenetic changes had taken place that changed their brain chemistry and literally "reprogrammed" their future behavior.
• C)severe genetic mutations had taken place from one generation to the next.
• D)the rats' DNA was damaged by environmental factors, such as exposure to ultraviolet light, radiation, or chemical toxins.

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Definitions:

Parrot Fever

Also known as Psittacosis, an infectious disease transmitted to humans by birds, particularly from the parrot family.

Parotitis

Inflammation of the parotid gland, one of the major salivary glands, which can lead to swelling and pain near the ears.

Esophageal Varices

Abnormally enlarged veins in the lower part of the esophagus, often associated with significant risk of bleeding in individuals with advanced liver disease.

Portal Hypertension

Portal hypertension is a condition characterized by increased blood pressure within the portal venous system, often leading to complications such as variceal bleeding, ascites, and encephalopathy.