Four of these five choices are substances that release ozone-destroying chemicals. Select the exception
a. evaporating fossil fuels
b. coolants
c. solvents
d. plastic foam
e. propellants in aerosol cans
a
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In transformation experiments using a variety of Bacteria, it has been noted that essentially all of the cells in a population can become competent
Indicate whether the statement is true or false.
A(n) _cell was used as the donor cell to provide genetic material that produced the cloned sheep, Dolly.5_QC_CS-34450
A. germ-line B. undifferentiated somatic C. mammary gland D. embryonic stem E. egg
A urine specimen from a maternity patient with the complaint of cystisis was recieved in the lab. The culture of tis sample grew a lactose- positive. Gram negative bacillys that was presumtively identified as E. Coli. On differential and selective media this organism would demonstrate which reaction?
A. Hektoen Enteric Agar= green/colorless colonies with black centers B. MacConkey Agar= Colorless colonies C. xylose-lysine-Desoxycholate Agar= yellow colonies D. Xylose-Lysine Desoxychocolate Agar= colorless colonies
Two genes within an organism that arose from the duplication of a single gene in an ancestor are ________.
Fill in the blank(s) with the appropriate word(s).