Which of the Following Was a Trend First Observed in the Evolution

question 33

Multiple Choice

Which of the following was a trend first observed in the evolution of the earliest tetrapods?

• A) the appearance of jaws
• B) feet with digits
• C) the mineralization of the endoskeleton
• D) the amniotic egg

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Definitions:

Abdominopelvic Cavity

An anatomical space in the human body that houses both the abdominal and pelvic organs, including the stomach, liver, and bladder.

Parietal Peritoneum

The outer layer of the peritoneum that lines the abdominal and pelvic cavities, not directly in contact with the organs.

Retroperitoneal

Referring to organs located behind the peritoneum, the serous membrane lining the abdominal cavity and covering the abdominal organs.

Visceral Peritoneum

The inner layer of the peritoneum, which covers the external surfaces of most abdominal organs.