Dolphins (Which Are Mammals)and Sharks (Which Are Fish)have Stiff Dorsal

question 71

Multiple Choice

Dolphins (which are mammals) and sharks (which are fish) have stiff dorsal fins projecting from their backs that help them maneuver through water. These structures are BEST described as:

• A)analogous structures.
• B)homologous structures.
• C)vestigial structures.
• D)mutations.

---

Definitions:

Conceptual Frameworks

Structures of concepts and ideas that guide thinking, research, and practice in various fields by providing an organized way to make sense of related phenomena.

Piaget

A Swiss psychologist known for his pioneering work in child development, specifically his theory of cognitive development that describes how children construct a mental model of the world.

Formal Operational Stage

In Piaget’s theory, the stage of cognitive development (normally beginning about age 12) during which people begin to think logically about abstract concepts.

Crib Death

Also known as Sudden Infant Death Syndrome (SIDS), it refers to the sudden and unexplained death of a seemingly healthy baby during sleep.