Question

Bacteria live in a variety of locations one of which is the human mouth. Which explanation supports the wide variety of bacteria in the mouth?

Answer 1

Bacteria have four basic needs: food, warmth, moisture, and time.

Your mouth has food, because when you eat, food gets stuck in between your teeth and gums.

Your mouth has warmth, which is pretty obvious right? Our bodies need to keep warm in order to function.

Your mouth has moisture. It comes from your saliva.

And we will always have time. The more time goes by, the more the bacteria multiply.

What's more is that the bacteria can actually cling to your teeth and gums, so that they don't get washed down your throat and into your stomach. Your stomach acid would destroy most of them.

Also, when we breathe in, we breathe more than just air. We breathe in the bacteria from that air. And that bacteria lodges itself onto our teeth and gums.

You see how your mouth is an ideal place for many bacteria to thrive and multiply?

Answer 2

Bacteria live in a variety of locations one of which is the human mouth. Which explanation supports the wide variety of bacteria in the mouth?
A. Accessibility to nutrients makes the mouth a favorable habitat.
B. Calcium in the teeth provides appropriate pH levels in the mouth.
C. Accessibility to air cause bacteria to change form.
D. Salivary glands cause mutations in populations of bacteria.

Answer 3

Bacterial Flora is a community of bacteria that exists on or in the body, and possesses a unique ecological relationship with the host.[1] Bacterial flora encompasses a wide variety of microorganisms, and the interactions between microbes and host creates a mutualistic relationship that both entities benefit from.[2] Humans in particular provide a diversified ecosystem for a large variety of microbes. An average human adds 37 million bacteria to the air an hour in a given space.[3] The mutualistic relationship has a significant impact on the host, and is thought to influence aspects such as human traits such as obesity.[4] In 2007, the National Institute of Health started the Human Genome Project designed to help understand the health implications of human bacterial flora.[5] Biologist believe that bacterial flora may play some role in disorders such as Multiple Sclerosis.[6] Additionally, the study of flora can have industrial benefits such as dietary supplements like probiotics.[7] The living microorganisms in probiotics are believed to have positive effects on health, and have been utilized in studies regarding gastrointestinal diseases and allergies.[8]

http://en.wikipedia.org/wiki/Bacterial_flora