Which of the following may be used to refer to water?
select all that apply.
a. it is an element made of only one type of atom.
b. its chemical formula is commonly shown as h2o.
c. its structure is two oxygen atoms bonded with one carbon atom.
d. its structure is two hydrogen atoms bonded with one oxygen atom.
e. its chemical formula is commonly shown as co2.
f. it is a molecule made of more than one type of atom.
g. it is a compound made of only one type of atom.

Select all the correct answers. lactobacillus is a bacteria that live inside humans. these bacteria live on the nutrients from our bodies. they to keep our gut clean and healthy. s. typhi is a bacteria that enter our bodies through contaminated food. this bacteria causes infections in the body. based on this information, which two statements about the association between these bacteria and humans are true? a. lactobacillus shares a parasitic relationship with humans. b. s .typhi shares a parasitic relationship with humans. c. both lactobacillus and s. typhi share a parasitic relationship with humans. d. both lactobacillus and s. typhi share a mutualistic relationship with humans. e. lactobacillus shares a mutualistic relationship with humans, and s. typhi shares a parasitic relationship multiply chrse

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels

Which description provides the best objective summary of the article in the passage?