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  1. A

    metal construction industry

    thanks so so much!!
  2. A

    metal construction industry

    Hi, i am having trouble with this question. I need one more common metal that is used in construction industries. I already have steel, aluminium and titanium but cant find anymore. Thanks in advance!
  3. A

    bacteria size pathogenicity

    what is the significance of bacteria's small size on their pathogenicity?
  4. A

    Products of nitrite and ozone???

    thanks so much!
  5. A

    Products of nitrite and ozone???

    Hi, what are the products of nitrite (NO2-) and ozone (O3)??? the chemical equation??
  7. A

    How does Tea Tree Oil kill bacteria?

    Hi, i am doing a science experiment and need to know how tea tree oil actually kills bacteria, like does it inhibit growth, stop DNA replication etc. I only know that the active ingredients is terpin-4-ol. thanks
  8. A

    gas exchange methods

    i have know idea about the answer to this question.. what are the advantages and disadvantages of the gas exchange methods used by frogs and insects. I know that frogs use the pressure pump method and insects use direct diffusion but thats about all. Thanks!
  9. A

    Bio qu

    thanks that really helped!
  10. A

    Bio qu

    hi, i have no idea about this qu for biology. Some algae that live in water have their photosynthetic cells in a layer around their outer surface. Explain the significance of this arrangement.
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