In choosing a lab activity, which should be omitted for ethical reasons?

• A. Genetic tracking of mice fur
• B. Dissecting a fetal pig
• C. Testing respiration rates in goldfish
• D. Pithing a frog to observe circulation

Answer: (D)

Pithing a frog to observe circulation involves a procedure that causes death and is considered invasive and harmful to the organism. Ethical considerations in scientific research emphasize the importance of minimizing pain and distress for living creatures. Pithing, which involves destroying the nervous system, raises significant ethical concerns regarding the treatment of animals in educational settings.

In contrast, other activities, such as genetic tracking of mice fur, dissecting a fetal pig, or testing respiration rates in goldfish, can often be carried out within frameworks that minimize discomfort or distress to the animals involved or are deemed acceptable under specific ethical guidelines. Thus, omitting procedures that cause harm or significant distress, like pithing a frog, aligns with current ethical standards in biology and education.