The _______ skeleton contains the bones of the skull, vertebrae, and ribs.
a. thoracic
b. appendicular
c. axial
d. ossicle
c. axial
The axial skeleton contains the bones of the skull, vertebrae, and ribs.
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Although carbon dioxide contains carbon, it is
not considered an "organic" compound because a. it is not found in the earth's crust. b. it is not present in living cells. c. the carbon atom is not bonded to at least one hydrogen atom. d. the carbons are not in chains or rings. e. it is too small.
Miller and Urey
1.put forth the theory of evolution. 2.created a laboratory simulation of conditions thought to exist on early Earth. 3.discovered they could produce DNA. 4.proved Mendel's work. 5.discovered that they could produce proteins.
In general, which of the following is the best way to distinguish males from females?
a. Males are more brightly colored. b. Males produce motile gametes. c. Males are larger. d. Males are more aggressive. e. All of the above are correct
Rb is a tumor suppressor gene; its normal function is to help restrain cell division. Loss of both copies of Rb is a causative factor in some kinds of cancer
You propose to treat these cancers by injecting the patients with a viral vector that carries a copy of the Rb gene and has the ability to infect all the cells of the body, thereby artificially driving expression of Rb in all the cells, including the cancer cells. Your colleague says "No!You'll simply kill the patient, because you will halt cell division throughout the body." A. Why would halting cell division throughout the body kill a full-grownadult person? B. Is your colleague right in thinking that forced expression of Rb in everycell will halt all cell division?