It’s the 3rd answer if ur going by the picture
I believe the answer to your question is is B
Answer:
Nutrients from fertilizer are harmful to aquatic ecosystems because they cause algae and other plant life to grow rapidly. This causes the oxygen level in the water to drop, which in turn kills fish and other animals in the ecosystem.
Explanation:
Answer:
Uracil
Explanation:
Like DNA, RNA is made up of nucleotides called ribonucleotides. However, unlike DNA, RNA contains the sugar ribose instead of deoxyribose and the base uracil instead of thymine. RNA also contains of only one polynucleotide chain. Uracil is a type of nitrogenous base that is replaced by thymine during the formation of RNA.
