481 Words 2 Pages Open Document There a lot of bacteria but one of the most harmful and helpful bacteria is E-coli.E-coli can be found in water tank of cities which is what you drink every day. Also can be found in cheese, milk, vegetables, beef patties.How E-coli can be good is...
Helpful and Harmful Insects 作者:Bobbie Kalman 出版社:Crabtree Pub Co 出版年:2005-3 页数:32 定价:$ 28.56 装帧:SAL ISBN:9780778723417 豆瓣评分 目前无人评价 评价: 推荐 内容简介· ··· Although some insects are considered pests, children will be surprised to discover just how important all ...
Manybirdstodayusehumanrubbishtobuildtheirnests(鸟巢).Isithelpfulorharmfulforbirdstouserubbishfornests?Youwillfindtheanswerinsomestudies.Birdsarebuildingtheirnestswithrubbish,said a newstudy.Therubbishincludescigarettebutts(烟头) andplasticbags.A groupofEuropeanscientistslookedintoabout 35,000 studiesonbirdnests....
Plastic bags are useful in keeping the animals warm, and other hard things, such as paper cards, can make nests stronger.However, in the end, human rubbish may only bring more harm to birds. The harmful chemicals in cigarettes hurt the little birds. The little birds may get sick or have...
AnimalsHumansT-LymphocytesMultiple SclerosisBrain DiseasesCytokinesMultiple sclerosis (MS) is thought to be an autoimmune disease. In healthy individuals, the T cells of the immune system, when activated by an infectious agent, regularly traffic across an intact blood-brain barrier, survey the CNS ...
This is now proven that even though it may not be harmful for an animal it still may be for humans so it is a pointless attempt to help us, in the long run and killing many of helpless animals in the meantime. Makeup, cosmetics, household products and many more are the harmful ...
releases styrene gas which can effect the nervous system. Also, as it usually burns with a sooty flame. This indicates that combustion isn't complete and a complex mixture of toxic chemicals is produced by the relatively low temperature of a backyard burn. This causes even more harmful affects...
Dogs use their(5)Ato find out the harmful insects(昆虫) in the trees.For example,in May every year, a kind of insects kill ash trees by(6)Btheir branches(树枝) and roots(树根).These insects lay eggs(下蛋) in the(7) C.When the eggs grow into insects,they begin to eat part of ...
Sometimes they work with the police and help 13 bad men. They also save people in danger. But do you know that people train dogs to help protect insects and animals?Dogs use their 14 to find out the harmful insects in the trees. For example, in May every year, a kind of insects ...
It is connected very closely with digestion and the regulation of blood sugar, among many other functions. Found behind the ribs on the right side of the abdomen, it has many important functions such as removing harmful material from the blood, making enzymes and bile that help digest food, ...