Which symptom indicates the presence of plaque in a dental patient?
a. Presence of E. coli in the patient's mouth.
b. A bacterial culture from a patient's mouth that appears pink after Gram staining.
c. Presence of cyanobacteria in the patient's mouth.
d. A bacterial culture from the patient's mouth that appears purple after Gram staining.
e. Non-pathogenic biofilms in the patient's mouth.
ANSWER: b
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Diseases that suddenly become prevalent are referred to as ________ diseases
A) indirect B) emerging C) vector D) common source
DNA has a double helix structure. Refer to the figure below. What two components make the outside rails (called the backbone) of the double helix?
a. nitrogenous bases and carbon
b. hydrogen and ribose
c. sugar and phosphate
d. enzymes and sugar
Four of the five answers listed below possess
some type of coelom. Select the EXCEPTION.
a. crustaceans b. annelids c. arthropods d. mollusks e. cnidarians
The ability to roll the edges of the tongue upward in a U-shape is considered to be an inherited trait. The standard assumption is that tongue-rolling is a dominant allele at a single gene locus. Which of the following would cast doubt on this assumption? Select all that apply.A) A student who can roll his tongue has both a mother and father who cannot.B) In a large research study, the majority of tongue-rollers were male.C) A research study with 1,000 participants reports that most non-tongue-rollers can learn to roll their tongues.D) A student who cannot roll his tongue has both a mother and father who can.
What will be an ideal response?