Hello!
If the number of snakes increased, the number of rabbits decrease.
If the number of insect eating birds decreased, the amount of grass increases.
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Simple handwashing is more than enough to stop the spread of infectious diseases. The hands play a major role in spreading pathogens because it can come into contact with infected surfaces. Make sure to wash your hands especially when they get soiled or before you eat or drink.
Answer:
DNA
Explanation:
Thymine is one of the four nucleobases that pairs with adenine to make up DNA, also called 5-methyluracil. It is replaced by uracil to make RNA molecules during transcription.
Theferore the unknown chemical analyzed was DNA because thymine is found in DNA and not in RNA molecules.
The correct answer is A !!
If two species have reproductive success then they share common descent as some traits that allow them to breed are present in both !!