Why is blood considered a connective tissue?
a. blood cells are derived from bone cells
b. blood cells are derived from pluripotent cells
c. blood cells help anchor muscle to bone
d. blood cells derive from epithelial cells
e. blood cells give structural support to blood vessels
ANSWER: a
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Which of the following radioisotopes could be used to accurately date a fossil that is thought to be over 750 million years old?
A. uranium 238 B. carbon 14 C. uranium 235 D. uranium 235 or uranium 238 E. carbon 14 or uranium 235
All of the following structures are associated with lycophytes EXCEPT
A. rhizome. B. microphylls. C. archegonia. D. microspores.
If you drive south of Las Cruces in the winter, you see a bird called a Kestrel every two miles. The birds are holding territories, thus regularly spaced out. This is an example of
A) learned dispersion. B) clumped dispersion. C) random dispersion. D) uniform dispersion. E) artificial dispersion.
To which section does the following excerpt most likely belong? "13 transects were run. Groups were observed at a distance for 30-60 m while the individuals were identified. A 300 m transect was then run along the previously observed line of feeding hippos"
A. Introduction B. Methods C. Results D. Discussion