It was possible to view viruses only after the invention of the electron microscope because they are too small to be seen with a light microscope.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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The most common agent(s) causing subacute bacterial endocarditis is/are

A. Streptococcus pyogenes. B. Pseudomonas aeruginosa. C. normal skin or mouth microbiota. D. Escherichia coli.

Biology & Microbiology

What is a simple way for determining if an annelid is a polychaete or a clitellate?  

A.  The number of segments B.  Possession of a closed circulatory system C.  The amount of chaetae (setae) D.  The layout of the digestive system Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about annelids? 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

Why doesn't the hydrochloric acid produced by the stomach digest its own lining cells?

A) The acid is specific to proteins, not cells. B) The stomach has a dense connective tissue lining. C) Lining cells produce a protective mucus layer. D) The cells make chemicals that quickly neutralize all the acid.

Biology & Microbiology

Spontaneous electrical rhythms the can be recorded from the surface of the scalp are:

A) a pathological condition that signals epilepsy B) a reflection of the constant movement of neurons C) generated by the activity of the populations of neurons D) a measure of myelin activity

Biology & Microbiology