Both measures are sometimes considered indications of cash flow. EBITA = earnings before tax (EBT) + interest expense + amortization expense. Since certain industries require significant investment in fixed assets, EBITDA can distort a company's profitability by ignoring depreciation.oth measures are sometimes considered indications of cash flow. EBITA = earnings before tax (EBT) + interest expense + amortization expense. Since certain industries require significant investment in fixed assets, EBITDA can distort a company's profitability by ignoring depreciation.
In this system, modern humans are classified as Homo sapiens. Evolution occurs when there is change in the genetic material -- the chemical molecule, DNA -- which is inherited from the parents, and especially in the proportions of different genes in a population. Genes represent the segments of DNA that provide the chemical code for producing proteins.
The evolutionary history of life on Earth traces the processes by which living and fossil organisms have evolved since life appeared on the planet, until the present day. Earth formed about 4.5 Ga (billion years ago) and life appeared on its surface within 1 billion years. The similarities between all present-day organisms indicate the presence of a common ancestor from which all known species have diverged through the process of evolution.