A person with frequent heartburn is more likely than others to eventually develop this condition

Why is it not surprising that Staphylococci are the leading cause of wound infections?

A. This genus is readily present as a part of the normal microbiota on most people's skin, so it could easily enter wounds. B. Members of this genus are all particularly virulent and highly capable of causing numerous infections. C. Staphylococci cannot be eradicated from the skin due to multidrug resistance in most members of the genus. Drugs simply don't kill them. D. Staphylococci are capable of a higher degree of spontaneous mutation than most microbes. This makes them able to acquire antibiotic resistance very readily, making them hard to eliminate by pre-surgical antibacterial scrubs. As such, they commonly infect surgical wound sites.

An environmental testing laboratory is unable to identify a single-celled organism isolated from a well water sample. Inspection of the microorganism with a compound microscope reveals that it uses pseudopodia for movement and is not enclosed within a mineral shell. Based on this information, this organism can be classified to which supergroup?

A. Opisthokonta B. Alveolata C. Amoebozoa D. Rhizaria E. Excavata

Which of the following tissue types is characterized by having cells suspended within an extracellular matrix consisting of a mixture of fibrous proteins and carbohydrates?

A. Nervous B. Muscle C. Epithelial D. Connective E. Digestive

The protein that carries oxygen in human blood is __________.

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