Which One Adaptation Was Most Important in Enabling Animals to Reproduce

question 3

Multiple Choice

Which one adaptation was most important in enabling animals to reproduce on land?

• A) penis
• B) shelled egg with extraembryonic membranes
• C) placenta
• D) gametes
• E) copulation

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Definitions:

Dehydrohalogenation

A chemical reaction that involves the removal of a hydrogen halide from a molecule, often used in the creation of alkenes from alkyl halides.

Mechanistic Pathways

The specific sequences of steps or reactions that lead to a chemical reaction or transformation.

E Isomer

Refers to the geometric configuration of molecules where substituents are on opposite sides of a double bond or around a ring structure.

E2 Mechanism

The E2 mechanism is a bimolecular eliminative reaction in organic chemistry where a hydrogen atom is removed from a β-carbon as a leaving group departs, forming a double bond.