This type of decay occurs on the outside flat surface of the teeth when bacteria is not removed and plaque builds up. It’s the least serious kind and may be treatable with fluoride. It’s also helpful to know that this type of decay may be positively impacted by regular and proper den...
Bacteria are single-celled organisms that are pretty much everywhere: in the ground, in the ocean, on your hands and in your gut. While some are harmful, most are not — and some are even beneficial to human health. In many cases, humans live in symbiosis with bacteria, maintaining a mu...
Friction is helpful to us in many ways: It allows us to walk without slipping. It helps vehicles stop by creating friction between the brakes and wheels. It enables us to write with a pencil. It allows us to grip objects firmly. It helps in lighting a m
While you can’t see or taste them, your mouth is home to colonies of microbes, including germs like fungus and bacteria. While most of these tiny oral bacteria are harmless—and even helpful—others can lead to tooth decay and gum disease. Luckily, with good oral care practices and a ...
Name & explain 2 advantages humans have against pathogenic bacteria. List several ways in which microbes affect the lives of humans. What is one of the great advantages bacilli have over other spore-forming bacteria? What are natural killer cells and what role do they play in the immune system...
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Bacteria: Bacteria are tiny organisms that are not visible to the naked human eye. They have no cell nucleus or other membrane-bound organelles and can only grow in a liquid medium. Bacteria can cause infections, diseases, and illnesses. Some bacteria are helpful to humans...
While yeast infections are a common nuisance for women, they don't usually bother girls who haven't started puberty. Unless she has recently finished a course of antibiotics (which can upset the balance of helpful and harmful bacteria in her system), is still in diapers (or training pants)...
That’s why it’s especially important to show compassion: Can you offer more flexibility to reduce their risk? What about people taking care of sick loved ones? Are there ways you can help ease their mind over their employment situation? What benefits do you offer that can help?
单项选择题 What does the “bacteria” mean? A. very small living things that may cause disease B. something helpful to our health C. a substance that we do not need to pay attention to D. something that we do not know yet