Erythropoietin is a hormone that is released from the kidneys to stimulate the production of red blood cells.
It’s c just took the quiz
The lake becoming ice is due to the water (freezing)
”The Smartfin is a surfboard fin with sensors that measure important ocean properties that help researchers and coastal communities understand trends in ocean health. ... Using an app on their phone, the data surfers acquire while in the water becomes accessible in near real-time to the world-wide scientific community.”