The Wings of a Bird and the Wings of a Bat

question 68

Multiple Choice

The wings of a bird and the wings of a bat both form from the front appendages (arms) . The bird wing is covered by feathers and the bat wing consists of a thin layer of skin stretched between the "finger" bones. Are the wings of the bird and bat homologous or analogous?

• A)homologous because they evolved from the same body part
• B)analogous because birds' flight requires feathers and bats use skin; both are wings, but they evolved differently
• C)both; they are homologous because they both evolved from a front appendage, but analogous because they evolved differently
• D)neither, because birds and bats do not share a recent common ancestor

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Definitions:

Interphase

Interphase is the phase of the cell cycle during which a cell prepares for division by growing in size, replicating its DNA, and conducting other normal cell functions.

Hereditary Material

Genetic material passed from parents to offspring, most commonly DNA, which carries the genetic instructions for growth, development, functioning, and reproduction of all known organisms and many viruses.

Apoptosis

A programmed cell death process that enables organisms to eliminate damaged or unnecessary cells in a controlled manner.

Infected Cells

Cells that have been invaded and multiplied by pathogenic microorganisms such as viruses, bacteria, or fungi.