Which of the following is not a component of the bacterial RNA polymerase core enzyme?
A. subunit ?
B. subunit ?
C. subunit ?
D. subunit ?
E. subunit ?'
C
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Which of the following is an example of an
event that would set up the scene for primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns off all of the surface vegetation c. an agricultural field that is abandoned d. a lake that dries up killing all of the aquatic plants e. all of these set the scene for secondary succession NOT primary succession
Tay-Sachs disease is a(n) ____ disease that results in blindness, intellectual disability, and death due to ____
a. sex-linked; the absence of one of the sex chromosomes b. autosomal recessive; accumulation of lipids in brain cells c. X-linked; accumulation of acetyltransferases in brain cells d. autosomal; sickled red blood cells e. autosomal dominant; accumulation of mucus in the lungs
Natural selection can only act on traits that
a) are adaptive b) reduce mortality c) are heritable d) are acquired in an individual's lifetime e) confer a reproductive advantage
Some viruses cause abnormal growth of cells rather than destruction. This is called ________.
Fill in the blank(s) with the appropriate word(s).