Answer:
a. All of these
Explanation:
<em>The characteristic of skin that makes it unpleasant for most bacteria would be due to all of the conditions.</em>
Most bacteria require humid condition in order to grow and as such, the desiccated nature of the normal human skin makes it difficult for them to establish themselves and grow on it.
The pH of the skin is usually acidic due to the production of lactic acid during sweating and the activities of the normal skin bacteria. The acidic pH hinders the growth of bacteria that can potentially become pathogenic to the skin.
Also, the skin produce antimicrobial substances at low pH which hinders the growth of pathogenic bacteria.
Hence, options b, c, and d are correct.
Answer: True
Explanation:
There is something called Skin flora. This refers to a group of microorganisms that reside on the skin. Staphlococcous aureus and Staphlococcous epidermidis are common examples. The Skin flora protects the skin from pathogenic organisms.
1 E-Coli Bacteria; 2 The Lenski experiments; 3 Mutation ... genomes that have many separate chromosomes with much longer ... The culture was a mixture of glucose and citrate with 10 times more ..... This hypermutation sometimes allows the bacteria to find a more beneficial gene expression more quickly.