Secondary xylem is formed in association with the ____
a. pith
b. inner face of the vascular cambium
c. outer face of the vascular cambium
d. inner face of the cork cambium
e. outer face of the cork cambium
b
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Chemotherapeutic agents that are natural products of microorganisms are most specifically referred to as ________.
A. antibiotics B. antimicrobial agents C. synthetic drugs D. semisynthetic drugs
Earthworms show all of the following features except
A. containing distinct head regions and parapodia. B. containing touch-sensitive and light-sensitive organs in the segments. C. being hermaphroditic. D. containing fewer setae than in polychaetes. E. containing segments with a mouth on the first and the anus on the last.
Who discovered penicillin?
A. Fleming B. Ehrlich C. Kitasato D. Pasteur E. Domagk
Each spore grows by mitosis into a haploid organism by called a ________
Fill in the blank(s) with the appropriate word(s).