The monomers of DNA are called Nucleotides. They are made up of a 5-carbon sugar(deoxyribose), a phosphate group and a nitrogenous base bound to the sugar. Adenine makes two bonds with Thyamine whereas Cytosine makes three bonds with Guanine.
Letter D would be likely it
2. Ionophores because they are class of proteins that move cell membranes. They are small, hydrophobic molecules that increase a cell's permeability to certain ions.
Natural selection helps the anteater get food easier than others.
Explanation:
The tick carries harmful bacteria that was released into Charlie's blood.
So, I can conclude that:
tick> indirect, bacteria direct
Hope this helped! Let me know if this is incorrect.