Some Molecular Data Place the Giant Panda in the Bear

question 50

Multiple Choice

Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser panda in the raccoon family (Procyonidae) .Consequently,the morphological similarities of these two species are probably due to

• A)inheritance of acquired characteristics.
• B)sexual selection.
• C)inheritance of shared derived characters.
• D)possession of analogous structures.

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Definitions:

Myelin Sheath

A fatty covering that surrounds nerve fibers, which speeds up the transmission of electrical signals along neurons.

Dendrite

A branched extension of a neuron that receives electrical signals from other neurons, contributing to neural connectivity.

Nerve Impulse

An electrical signal that travels along a neuron, conveying information from one part of the body to another.

Resting Potential

The voltage difference between the inside and the outside of a neuronal membrane when the neuron is not firing.