Examlex
A researcher is interested in creating a phylogenetic tree showing the evolutionary relationship of several cyanobacterial species based on the closeness of their nitrogenase gene sequences. Which field of research most directly applies to the researcher's project?
Ventricles
The two lower chambers of the heart, or the central cavities in the brain.
Capillaries
The smallest blood vessels in the body, connecting arteries to veins, which facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrient and waste substances between blood and surrounding tissues.
Arteries
Blood vessels that carry oxygen-rich blood away from the heart to the body.
Echocardiography
Echocardiography is a diagnostic procedure that uses ultrasound waves to create images of the heart, allowing for the assessment of its structure and function.
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