The sepals of a flower make up the
a. receptacle.
b. corolla.
c. carpel.
d. calyx.
e. filament.
D
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When DNA gyrase was isolated, Brown and Cozzarelli assessed its activity by gel electrophoresis
Relaxed DNA was shown to become increasingly supercoiled over time until all of the relaxed DNA at the top of the gel would run at the bottom of the gel. If the pattern of bands generated by DNA gyrase was compared to the pattern of a type I topoisomerase, how would they differ? What will be an ideal response?
Translocations and inversions represent a change in the total genetic material of a chromosome
Indicate whether the statement is true or false
Density-independent controls over population growth include:
a. parasites b. temperature c. disease d. competition for food e. competition for shelter
Which structure makes proteins using coded instructions that come from the nucleus?
A. Vacuole B. Mitochondria C. Ribosome D. Golgi