Trivia

Hard

Unlike Humans, Octopus Blood Is Not Iron-Based But?

Silver-Based
Manganese-Based
Sulfur-Based
Copper-Based

Answer: Copper-Based

Life in the ocean requires creatures to make all sorts of adaptations for everything from the cold, to the pressure, to the salinity, and the octopus is no exception. Unlike humans (and most other creatures for that matter), octopuses don’t have red blood, but blue.

Our blood is red because of the iron-based hemoglobin molecules within it. Octopuses, on the other hand, have hemocyanin which is like our iron-rich blood, but the iron atoms are replaced with copper. The copper-based blood molecules are more efficient at transporting oxygen when the temperature and oxygen levels are low, an adaptation well suited for life in the deep and cold waters of Earth’s oceans.

There is, however, one downside to this adaptation–they are, as a result of it, very sensitive to changes in the pH value of the water around them. With that in mind, many scientists are concerned about trends in ocean acidification and the impact it will have on octopus populations.

Trivia

Easy

Which U.S. State Was The First To Grow Coffee Commercially?

Trivia

Easy

In The Early 20th Century City-Dwelling Mothers Would Put Their Babies In What Curious Contraption?

Trivia

Hard

What Influenced The Practice Of Left-Side Driving?

Trivia

Hard

Who, Adjusted For Inflation, Is The Richest Man In History?

Trivia

Very Hard

The First Vehicular Combat Video Game Was?

Trivia

Hard

Which Of These Performers Promoted An Album Release With Giant Statues Of Themself?

Trivia

Hard

Which Video Game Company Originally Sold Leather Goods?

Trivia

Hard

To Protect Their Unique Makeup Styles, Professional Clowns Cleverly Copyrighted Which Of These?

Trivia

Hard

Which U.S. Coin Is The Most Cost Effective To Mint?

Trivia

Easy

The Word “Fortnight” Is Derived From?