Notchochord, morphology, chordates
Answer:
Amino acid sequence is directly related to the differences in the DNA of the species.
Explanation:
Above situation is related to the evolutionary research in which scientists are in search of common characteristics between species and from those species they will examine the amino acid sequence of proteins because amino acids sequence is directly related to the sequence of DNA and DNA is the main thing among all other variables by which differences in species can be identified effectively.
Answer:
A. the frequency will decrease because all mutations are harmful, thus People with the mutation will die.
Carbon dioxide because people in other animals exhale carbon dioxide as a waste product. People and other animals need oxygen for plants produce oxygen during an important process called photosynthesis which turns the sun energy into nutrients so carbon dioxide would be the answer.