Each of the following bones is part of the axial skeleton EXCEPT which one?
A) ribs
B) vertebrae
C) sternum
D) maxilla
E) clavicle
E
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If a portion of a transcription factor's domain is the same in a variety of organisms, it is called a motif
Indicate whether the statement is true or false
Which of these following marine ecosystems has the highest mean net primary productivity?
a. continental shelf b. estuaries c. kelp beds and reefs d. open ocean e. upwelling zones
Root hairs absorb nutrients from soil against the nutrient concentration gradient. To achieve this, root hairs use _____.
A. proton pumps B. facilitated diffusion C. direct diffusion D. osmosis
Which of the following would be the most problematic for the natural environment in the development of genetically engineered crops?
A) the introduction of male sterility into crops B) the creation of transgenic crops with apomictic seeds C) the creation of crops with flowers that develop normally, but fail to open D) the creation of transgenic crops that hybridize more easily