5]Listen to the podcast and choose the statements that are made.听播客,选择所做的陈述。1 Biodiversity is important.生物多样性是很重要的。2 Bacteri arealwaysharmfulto humans细菌对人类总是有害的。3 Some species of bacteria are used in food production.有些种类的细菌被用于食品生产。4 Many specie...
Are microorganisms always harmful to the human body? Why is penicillin selectively toxic to bacterial cells but harmless to human cells? Is the phage virus harmful to humans? Are helminths harmful to humans? How do killer T-cells destroy pathogens? Explain ...
Bacteria are an example of a microorganism. There are many microorganisms in the human body, and many of these microorganisms help the body function properly. For example, there are bacteria in the intestines that help to digest the food that we eat....
Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of seafood, grains, nuts, seeds, beans, and mushrooms. When people handle food properly, the risk of food poisoning is very small Microorganisms multiply rapidly in dirty places ...
Bacteria. Bacteria are microorganisms made up of asingle prokaryotic cell. There are two general categories of cells: prokaryotic and eukaryotic. Sometimes, organisms are referred to as prokaryotes or eukaryotes, based on the type of cell(s) that compose them. ...
Biocides are used to control harmful and unwanted organisms and microorganisms. However, not only do they kill pathogens, they also kill non-pathogens, meaningthey may also be dangerous for humans. ... Biocides pose a particular risk to pregnant women, unborn life, small children, or people wi...
dangerous microorganisms.People should also wash food covered with chemicals before eating it.Finally people should not eat raid mushrooms or other foods that grow in the wild.Some of these foods may contain natural materials that are poisonous to humans.In addition some types of fish can be ...
Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of seafood, grains, nuts, seeds, beans, and mushrooms. When people handle food properly, the risk of food poisoning is very small. Microorganisms multiply rapidly in dirty places and in warm...
dangerous microorganisms.People should also wash food covered with chemicals before eating it.Finally,people should not eat raid mushrooms or other foods that grow in the wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types of fish can be ...
We find different types of microbes - also known as microorganisms - by collecting soil samples from nature. We then screen these samples for new microbes. Some microbes are able to produce the right enzyme. Others grow fast and produce lots of enzymes. We need microbes that can do both. ...