A Major Difficulty Facing Systematists Is

question 79

Multiple Choice

A major difficulty facing systematists is

• A) distinguishing similar features due to common ancestry from those due to convergent evolution.
• B) placing specimens into the predefined taxonomic categories of species and genus.
• C) distinguishing anatomy from physiology in plant evolution.
• D) understanding the sequence of cell divisions in the early embryology of plants and animals.
• E) sequencing DNA.

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Definitions:

Motor Fibers

Nerve fibers that transmit impulses from the brain or spinal cord to muscles or glands, orchestrating their movement or activity.

Schwann Cells

The principal glia of the peripheral nervous system, responsible for the formation of myelin.

Peripheral Nervous System

The part of the nervous system outside the brain and spinal cord, comprising nerves that connect the central nervous system to limbs and organs, essential for relaying sensory and motor information.

Myelin

A fatty substance that surrounds the axons of many neurons, acting as insulation to speed the transmission of electrical impulses.