The Primitive Streak in a Bird Is the Functional Equivalent

question 21

Multiple Choice

The primitive streak in a bird is the functional equivalent of

• A) the lip of the blastopore in the frog.
• B) the archenteron in a frog.
• C) polar bodies in a sea urchin.
• D) the notochord in a mammal.
• E) neural crest cells in a mammal.

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Definitions:

Enthalpy Reaction

A thermodynamic quantity equivalent to the total heat content of a system, representing the sum of its internal energy and the product of its pressure and volume, especially useful in the study of heat exchange in chemical reactions.

Electrochemical Reaction

A chemical reaction that involves the transfer of electrons from one species to another, often associated with electricity.

Exergonic

Describing a chemical reaction that releases energy to its surroundings, typically in the form of heat or work.

Endergonic

Endergonic refers to a chemical reaction where energy is absorbed from the surroundings, generally requiring an input of energy to proceed.