BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A Microbes first appeared over 3.5 billion years ago and have coevolved with humans over the past six million years.
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B Studies suggest that rapidly increasing antibiotic use in the United States has reduced thediversity of our microbiomes.
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C Bacteroides are the most numerous bacteria in the human body and help it digest food.
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D The human body is an ecosystem made up of microbes that play a variety of roles in human health.
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Detailed explanation-1: -All the microbes in and on the human body form communities. These communities are part of the ecosystem of the human body. Together, all of these communities are known as the human microbiome. No two human microbiomes are the same.
Detailed explanation-2: -Though invisible to the naked eye, rich worlds of microbes are contained in our bodies. Our gut, skin, mouth, and most of our body is home to unique communities of microbes including viruses, protists, bacteria, archaea, and fungi.
Detailed explanation-3: -Microbes cause infectious diseases such as flu and measles. There is also strong evidence that microbes may contribute to many non–infectious chronic diseases such as some forms of cancer and coronary heart disease. Different diseases are caused by different types of micro-organisms.
Detailed explanation-4: -The human microbiota consists of the 10-100 trillion symbiotic microbial cells harbored by each person, primarily bacteria in the gut; the human microbiome consists of the genes these cells harbor[1].