The majority of signal molecules are peptides and small proteins. Both are made of a chain of amino acids, the difference being the number of amino acids that make up the molecule. Generally, if the signal molecules has fewer than 50 amino acids it is considered a peptide. If it has more it is considered a protein.
Answer: S phase
Explanation: during this phase the cell replicates it's DNA.
The cell synthesis mRNA and proteins which lead to mitosis
Because there ice everywhere in greenland, and albedo is the melting of snow and ice