Considering the Phylogenetic Evidence That Feathers Evolved Prior to Flight,what

question 35

Multiple Choice

Considering the phylogenetic evidence that feathers evolved prior to flight,what might have been the original function of feathers?

• A)Heat retention
• B)Facilitating tactile sensation
• C)Waterproofing
• D)Shielding from sunlight
• E)All of the above

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Definitions:

Activation Energies

The minimum amount of energy required to initiate a chemical reaction.

Antibonding π Molecular Orbital

A molecular orbital formed when lobes of p orbitals on two atoms combine in a phase mismatch, weakening the bond between the atoms.

Allyl Cation

A positively charged species (ion), specifically a reactive intermediate with the structure CH2=CH-CH2+.

LUMO

The Lowest Unoccupied Molecular Orbital, which is the lowest energy orbital that can accept electrons.