When the SRY gene of the Y chromosome becomes active (around 7 weeks), the ____
a. Müllerian and Wolffian ducts both develop into male reproductive structures
b. Müllerian ducts develop into male reproductive structures and the Wolffian ducts disappear
c. Müllerian ducts disappear and the Wolffian ducts develop into male reproductive structures
d. Müllerian and Wolffian ducts both disappear
e. Müllerian and Wolffian ducts both develop into female reproductive structures
ANSWER: c
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The production of human proteins (e.g., insulin) by genetically engineered microorganisms is an example of ________, a subdiscipline of microbiology
A) applied microbiology B) biotechnology C) industrial microbiology D) molecular microbiology
While walking through a nearby park, you stop to admire your favorite stone sculpture, and find that it is covered, in a few places, with green, crust-like organisms. Which statement is true?
a. The green organisms are fungi that will die soon enough, because they cannot digest stone. b. The green organisms are plants that will die soon enough, because they cannot root in stone. c. The green organisms are actually lichen that will grow and spread, if the weather permits. d. The green organisms are colonies of bacteria that feed on certain types of limestone.
From the outside of a flower to the inside,
which of the following is the correct order of structures?
a. calyx>corolla>stamen>carpel b. corolla>calyx>stamen>carpel c. calyx>corolla>carpel>stamen d. corolla>calyx>carpel>stamen e. calyx>carpel>corolla>stamen
A postulate is
A) an educated guess. B) a hypothesis. C) a set of four statements that confirm that evolution will occur. D) an idea that has been proven through scientific investigation. E) a statement accepted as true for the purposes of logical argument.