Protective features of the skin include all of the following except ________.
A. a keratinized surface
B. high pH
C. high salt content
D. resident biota
E. lysozyme
Answer: B
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The Golden Age of Medical Microbiology
A. occurred during the late 1800s to early 1900s. B. started in the 1990s with the advent of genetic engineering. C. is a time when the knowledge of and techniques to work with bacteria blossomed. D. was when people realized that diseases could be caused by invisible agents. E. occurred during the late 1800s to early 1900s, is a time when the knowledge of and techniques to work with bacteria blossomed AND was when people realized that diseases could be caused by invisible agents.
Which species is named for their ability to use tools?
a. Homo erectus b. Homo habilis c. Australopithecus afarensis d. Homo floresiensis e. Neanderthals
Examine the photomicrograph on the right, taken using an oil-immersion objective, the highest practical magnification of a light microscope. (The final magnification is 770x.)
(a) Based on your observation, identify the kingdom to which the organism belongs. (b) Justify your answer.
Small interfering RNAs (siRNAs) are a type of small regulatory RNA that, like microRNAs, are incorporated into the RISC complex
A. true B. false