Imagine that you are walking in a penguin colony and you find a bird's humerus. The skin and feathers disappeared long ago, leaving only the bleached bone
You know that the bone must have come from either a penguin or a gull because those are the only two birds of appropriate size that live in the area. How can you determine which kind of bird the bone came from?
How heavy is the bone? The bones of flying birds are light, but the bones of diving birds are denser because they have increased ossification and reduced air space. These changes make diving birds neutrally buoyant in the water.
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The lateral corticospinal tracts include a ________ of the upper motor neuron axons that pass through the medulla, and they govern control of ___________
A. majority, axial muscles B. majority, muscles used for finely controlled movements C. minority, axial muscles D. minority, muscles used for finely controlled movements
The pH scale ________
A) measures the hydrogen ion concentration of a solution B) defines neutral as a pH of 5 C) ranges from 1 to 7 D) measures the salt concentration of a solution
Cartilage is separated from surrounding tissues by a fibrous
A) perichondrium. B) ground substance. C) periosteum. D) chondroplasm. E) matrix.
Slow growth is a physical characteristic of a protein deficiency
Indicate whether the statement is true or false