The Fossil Fish Tiktaalik Made Headlines in 2005 Because It

question 15

Multiple Choice

The fossil fish Tiktaalik made headlines in 2005 because it

• A) was preserved with a hook in its mouth and represents the oldest evidence of human fishing.
• B) was the largest shark ever recovered from the fossil record.
• C) represents a transitional form between lobe-finned fish and terrestrial vertebrates.
• D) was found alive in the modern deep ocean; previously,the fish was thought to be extinct.

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Definitions:

Cisterna Chyli

A dilated sac at the lower end of the thoracic duct into which lymph from the intestinal trunk and two lumbar lymphatic trunks flows.

Thoracic Duct

The main lymphatic vessel that drains lymph from the lower and left side of the body into the circulatory system.

Lumbar Trunks

Large lymphatic vessels in the lumbar region of the body that drain lymph from the lower limbs, abdominal wall, and pelvic organs.

Subclavian Vein

A major vein on either side of the body that receives blood from the arm and the thorax, leading to the superior vena cava.