5. Make a molecular evidence cladogram. Cytochrome c is a protein located in the mitochondria of cells involved with cellular respiration. Compare each organism's Cytochrome CDNA sequences with the ancestor cell and each other. Highlights are the differences (mutations) present in the cytochrome CDNA sequences from ancestor cell. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 29 30 31 32 33 34 35 36 38 39 CESTOR CELL A T TAG CGA ATTAGC G A C CAGT T TAT CCT ACA AT C C cGT CT ACTTCAT 11 ATTATCG AC CAGTTTAT CCT ACATT Ccc GTATA CTT CGT13 RTHWORM CT TATC G AC C CGTTT ATCCTACATTCC c GT CTACTT C CTTATC c cc c cGT T T ATCCTACTTT C C C GT CTACTTC c CAG TATAT C C TACA ATc c G T C TACT T C ATTO МОЕВА ONGE т 15 IARK т 18 т A A A T. clclTl AclI т| 19

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Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.

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The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment. 

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The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.