Why do people drink from water sources that are contaminated?

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

Where does the citric acid cycle take place in eukaryotic cellular respiration?