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:

Major Depressive Disorder

A mental health disorder marked by persistent feelings of sadness, lack of interest in activities, and other symptoms that impair daily functioning.

Acute Mania

Describes a period of excessively elevated mood, energy, and unusual thought patterns, often associated with bipolar disorder.

Labile

Describes emotions that are easily altered or that fluctuate frequently and intensely, often seen in certain mood disorders.

Euphoric

A state of intense happiness and excitement.