Solution:
The genetic material dna consists of basic subunits called Nucleotides.
Nucleotides are the subunits of DNA. The four nucleotides are adenine, cytosine, guanine and thymine.
The germs from her hands mixed with those in the petri dishes and some were contaminated
Answer:
Here are some examples of hypothesis statements:
If garlic repels fleas, then a dog that is given garlic every day will not get fleas.
Bacterial growth may be affected by moisture levels in the air.
If sugar causes cavities, then people who eat a lot of candy may be more prone to cavities.
About 160 years. After Charles Darwin came out with his theory people have been debating it.