How do we know evolution happens? describe the transitional fossils associated with whale evolution. include specific examples of these fossils and explain why they are considered to be whale ancestors?

The transitional fossils associated with whale evolution include many characteristics that lead scientists to their conclusions today. Millions of fossils are found in layers and layers of rock and are all connected in some way. The layering of the rock has also been proof of evolution over time. All fossils are said to be puzzle pieces to the originality of animals. Some of these fossils happen to be in relations with whales. 

B] nitrogen fixationmight be wrong, so correct me.want extra on your answers? just go on my account and go on questions and answer, or ask in the comments!

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein