In the Evolution of the Vertebrate Circulatory System, a Transitional

question 93

Multiple Choice

In the evolution of the vertebrate circulatory system, a transitional step led to separate pulmonary and systemic circuits. This step can be observed in

• A) lungfish.
• B) the ancient ostracoderm.
• C) birds.
• D) amphibians.
• E) reptiles.

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Husbands And Wives

Partners in a marital relationship, often associated with social, legal, or personal commitments to each other.

Teen Years

A period in human development that occurs between childhood and adulthood, typically ranging from ages 13 to 19.

Contact With Peers

Interactions and relationships with individuals of similar age or status, which are important for social development and emotional support.

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