A Major Difficulty Facing Systematists Is

question 56

Multiple Choice

A major difficulty facing systematists is

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

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Definitions:

Pulmonary Trunk

The major blood vessel that originates from the right ventricle of the heart and bifurcates into the right and left pulmonary arteries, carrying deoxygenated blood to the lungs.

Pulmonary Artery

The pulmonary artery is a large blood vessel that transports deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.

Pulmonary Vein

A blood vessel that carries oxygenated blood from the lungs back to the left atrium of the heart.

Cerebral Arterial Circle

A circulatory anastomosis that supplies blood to the brain and surrounding structures, also known as the Circle of Willis.