The arachnoid villi are found in the ____________________.
Fill in the blank(s) with the appropriate word(s).
dural sinuses
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If the demand for calcium needed to produce egg shells regularly exceeds the level of calcium intake, egg-laying birds may replace all of their medullary bone to meet that demand
Indicate whether the statement is true or false
The shaft of a long bone is called the ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements regarding vision is FALSE?
A. The cornea refracts light rays more strongly than the lens. B. Presbyopia is a condition in which the lens cannot accommodate adequately for near vision. C. Myopia is a condition in which the lens focuses light from distant objects behind the retina. D. Cataract is an increase in opacity (clouding) of the lens. E. The image of an object that is focused on the retina is upside down relative to the object's actual position in space.
Chemically, a radioactive isotope behaves the same way as the stable isotopes of a given element.
Answer the following statement true (T) or false (F)