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.
C.
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Which is the correct pathway of a protein through a cell as it is being made?
A. Nucleus, smooth endoplasmic reticulum, Golgi apparatus B. Ribosome, Golgi apparatus C. Nucleus, Golgi apparatus, ribosome D. Golgi apparatus, ribosome, rough endoplasmic reticulum
Conventional wisdom holds that oxpeckers remove ticks from the backs of cattle on which they feed in a mutualistic relationship, and the cattle tolerate the oxpecker's presence because the birds help remove parasites
Weeks (2000 ) performed observational experiments in Zimbabwe and demonstrated that the relationship between oxpeckers and cattle was not the removal of parasites but that the oxpeckers are ________. A) mutualistic, but serve only to remove earwax from the cattle on which they feed B) in fact parasitic, and create and feed on wounds they make, and also feed on earwax in the cattle C) mutualistic and only feed on open wounds that have already been created by feeding ticks D) parasitic and feed on earwax and the open wounds they create during the removal of the earwax E) mutualistic and feed on open wounds that have already been created by ticks, and additionally feed on earwax
The organelle that consists of a stack of flat, membrane-enclosed sacs is the
A) mitochondrion. B) nucleolus. C) Golgi apparatus. D) nucleus.
The cilia of auditory hair cells are embedded in the ____
a. tectorial membrane b. semicircular canals c. cochlear duct d. scala tympani e. scala vestibuli