SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
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Bacteria become resistant to antibacterial medication that humans use for treatment.
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Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.
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Bacteria in improperly prepared food is consumed by humans, causing food poisoning
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Detailed explanation-1: -Vitamin K is made naturally in the intestinal tract by the gut flora which is an important factor in bone health and wound healing. The intestinal tract of man provides food and habitat for the bacterium to survive. Hence, it is a mutualistic relation. Thus, the correct answer is option A.
Detailed explanation-2: -Which of these best demonstrates mutualism between certain types of bacteria and humans? Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
Detailed explanation-3: -The human cannot digest all of the food that it eats. The bacteria eat the food that the human cannot digest and partially digest it, allowing the human to finish the job. The bacteria benefit by getting food, and the human benefits by being able to digest the food it eats.
Detailed explanation-4: -The human requires oxygen for life and plants use the carbon dioxide for photosynthesis. Here both human and plants are mutually benefited. Humans use the oxygen given by the plants. In return, plants use carbon dioxide, which is exhaled by the Humans.
Detailed explanation-5: -Interactions between algae and fungi that comprise lichens and between termites and the protozoa that inhabit their digestive systems are examples of mutualistic symbioses.