Question

Write an essay about bacteria (400 words) . Use your own words. The body should continue 3 paragraphs.

Please send a soft copy to my email (Microsoft word)

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Answer 1

Bacteria are present everywhere, in the air we breathe, in the food we eat and drink, even thousands of meters underground and deep in the ocean. A shovel of earth contains billions of them. per square centimeter, our skin has around 100,000 bacteria and millions of other bacteria are present in our body. Some types of bacteria live in extreme environments, some heat-loving bacteria live in hot springs, places where the water temperature exceeds 100 ° C. Others can live in cold water or in the soil at 0 ° C. Some bacteria live in very salty waters, like that of the Dead Sea.

Bacteria have three basic forms: spheres, rods and spirals, classified as prokaryotes because they do not contain a nucleus attached to the membrane or internal structures called organelles. Most of the genetic material of a bacterial cell is found in its unique circular chromosome that is found in the cytoplasm. Many bacteria also have a small circular piece of DNA called a plasmid. Ribosomes are also found in the cytoplasm of a bacterial cell. Bacteria usually reproduce by fission. through a process sexual reproduction Some bacteria exchange genetic material.

Bacteria obtain food in a variety of ways. Some make their food and others get it from the environment.. Other bacteria use energy from chemical reactions to make food.they are producers and consumers as well . They do not make their own food. Some decompose dead organisms for energy; Some bacteria produce chemicals called antibiotics that limit the growth of other bacteria. For example, a type of bacteria that is commonly found living in the soil produces the antibiotic streptomycin. Another type of bacteria, Bacillus, produces the antibiotic found in many antiseptic ointments without a prescription. Many bacterial diseases in humans and animals can be treated with antibiotics.