The principal cause of dental caries is

A. S. mutans.
B. S. salivarius.
C. S. mitis.
D. S. sanguis.


A. S. mutans.

Biology & Microbiology

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Ribozymes are non-protein molecules with catalytic activity

Indicate whether this statement is true or false.

Biology & Microbiology

Chemical inhibitors of hormone synthesis or signaling are powerful tools that yield invaluable information about hormone function.  Triadimefon, propiconazole, and spironolactone are just a few of the compounds identified to inhibit the function of brassinosteroids (BR). Which of the following are probable physiological effects due to the inhibition of BR? Check all that apply.  

_____  reduced mitotic activity _____  rapid aging _____  reduced xylem and phloem differentiation _____  increased stem length Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean?   Gather Content · What do you already know about brassinosteroids? How does it relate to the question?   Consider Possibilities   · What other information is related to the question? Which information is most useful?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

The cardiac skeleton

A. forms fibrous rings around the atrioventricular and semilunar valves. B. serves as electrical insulation between the atria and ventricles. C. provides a rigid source of attachment for cardiac muscle. D. provides solid support for the heart valves. E. has all of these characteristics.

Biology & Microbiology

The flow of energy is one way, but nutrients in ecosystems ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology