In the accompanying figure, the region that is composed of secondary xylem is:
a. outer bark
b. inner bark
c. wood
d. bark
e. vascular cambium
c
Biology & Microbiology
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What is the maximum number of electrons in the first energy shell of an atom?
A. 8 B. 32 C. 4 D. 2 E. 18
Biology & Microbiology
Which component is the oxidizing agent in the following chemical reaction?
4 Fe + 3 O2 ? 2 Fe2O3 a. water b. iron c. oxygen d. rust e. hydrogen
Biology & Microbiology
The existence of of a particular locus can only be inferred if there are no allelic variants at that locus
__________________ Indicate whether the statement is true or false.
Biology & Microbiology
The presences of different genes for several types of hemoglobin in mammals, but not in sharks and
many other vertebrates, is evidence of ____ of genetic material.
a. an inversion b. duplication c. reciprocal translocation d. deletion e. both duplication and deletion
Biology & Microbiology