The Partial Twinning That Led to the Births of Conjoined

question 19

Multiple Choice

The partial twinning that led to the births of conjoined twins Abby and Brittany Hensel must have happened during the first two weeks of gestation,because the girls

• A)share tissues that descend from ectoderm,endoderm,and mesoderm.
• B)share only tissues derived from mesoderm.
• C)were born on time.
• D)have two separate nervous systems.

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Definitions:

Employment Success

The achievement of career goals and attainment of stability and satisfaction in one's professional life, often measured by promotions, salary increases, and occupational fulfillment.

Hypothesis

A proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Naturalistic Observation

A study technique where participants are watched in their usual environment with no intervention by the investigator.

Social Skills

The abilities required to communicate, interact, and form relationships with others effectively and appropriately.