Refer to the Table

question 4

Short Answer

Refer to the table. The table shows the divergence times (time since last common ancestor) between different species of butterflies and the numbers of changes that have occurred at two different genes.What is the rate of evolution of the gene for alcohol dehydrogenase? Note that there are two lineages (branches) from the common ancestor within which evolution is occurring.

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Definitions:

Motor Neurons

Nerve cells that transmit impulses from the central nervous system to muscles or glands, eliciting a response.

Skeletal Muscle

A type of muscle tissue that is attached to bones and enables voluntary movements of the body parts.

Myasthenia Gravis

An autoimmune disorder characterized by weakness and fatigue of the skeletal muscles, caused by a disruption in the communication between nerves and muscles.

Acetylcholinesterase Activity

The process by which the enzyme acetylcholinesterase breaks down acetylcholine, a neurotransmitter, in the synaptic cleft to terminate the transmission of a nerve impulse.