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wrote...
12 years ago
Megan had a job in a squid fishery and noticed that squid blood was blue in color. Why is it blue?

 A. She was seeing blood from veins rather than arteries. 
 
 B. The blood was carrying oxygen. 
 
 C. Squids have tracheal systems.

 D. Squids do not use blood for transporting gases. 
 
 E. The squids were likely oxygen-deficient.
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wrote...
Staff Member
12 years ago
Squid blood is blue, not red as in humans. This is because squid blood contains a copper-containing compound called haemocyanin. In humans the blood is red and contains the iron compound haemoglobin.

That said, picking one of those options is hard to say, try (B) Undecided
- Master of Science in Biology
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andalitza Author
wrote...
12 years ago
B. The blood was carrying oxygen. 
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