Derek is a gymnast, and his favorite event is the rings. to score well, he is required to hold a position for several seconds before continuing into the next move. in his favorite move, he performs shoulder abduction to form a "t" and then holds it without moving. while derek is holding this position, what type of contraction is his deltoid performing?
a. an eccentric contraction
b. a concentric contraction
c. a static contraction
d. a dynamic contraction

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which sequence correctly shows the path of carbon dioxide during repiration?

What is the name of the type of cell division that occurs in the prokaryotic cell cycle