The acetabulum is the cup-like structure where the femur articulates. The head of the femur is the specific structure which articulates in the acetabulum.
B) Around 300 million years ago, the regions where coal formed were located in tropical climates that were partially submerged on the coasts
Explanation:
The distribution of the world's major coal reserves supports the the theory of plate tectonics because the regions where they formed were in tropical climates around 300 million years ago.
Coal is a fossil fuel used to produce energy when burnt.
They are formed in tropical swamps where there is luxuriant plants life.
To form a coal, a terrain such as swamp must have rich plant life. The plant is rapidly buried and cut off from the oxic environment. Further burial under heat and pressure transforms the plant matter into coal.
- The major reserves of coal in the world today is found in Europe and North America
- These are temperate regions whose conditions do not favor the formation of coal.
- Those regions must have moved from around the equator to their present day position.
- The coal formed when they were much closer to the equator around 300 million years ago.
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Answer:
The correct answer will be- compound fracture.
Explanation:
Bone fracture is the breaking of bone due to accidents, sports injuries, falls, osteoporosis and low bone density.
The fracture should be of various types depending on the degree but a type of fracture where a fractured bone protrudes out from the skin is known as an open fracture or compound fracture. The open fracture can also be a case of a medical emergency as it could lead to osteomyelitis, a type of bone infection.
Thus, the compound fracture is the correct answer.
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