Describe what is meant by a gratuitous inducer. Give an example
What will be an ideal response?
A gratuitous inducer is a chemical analog of a natural inducer. It serves as an inducer but is not a substrate for the reactions related to the natural inducer. Isopropylthiogalactoside (IPTG) is a gratuitous inducer of the lactose operon.
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From what are fruits derived?
A. styles B. ovaries C. stigmas D. anthers E. filaments
A waxy cuticle helps land plants ______________
a. conserve water c. reproduce b. take up carbon dioxide d. stand upright
Bayliss and Starling first demonstrated the existence
of hormones when they were studying which of the following? a. thymus b. islets of Langerhans c. bursa of fabricus d. pancreas e. none of the above
__________ are small leaves with a single vascular strand
a. Megaphylls b. Microphylls c. Thalli d. Strobili e. Sori