Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Afro-Brazilians
Table title:
Genetic studies
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Line </th><th colspan=1 rowspan=1 > Origin </th><th colspan=1 rowspan=1 > Negros (Black)| </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=3 > Maternal (mtDNA) </td><td class="highlighted"  colspan=1 rowspan=1 > native African </td><td class="highlighted"  colspan=1 rowspan=1 > 85% </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Europe </td><td class="highlighted"  colspan=1 rowspan=1 > 2.5% </td></tr>
<tr> <td colspan=1 rowspan=1 > Native Brazilian </td><td colspan=1 rowspan=1 > 12.5% </td></tr>
<tr> <td colspan=1 rowspan=3 > Paternal (Y chromosome) </td><td colspan=1 rowspan=1 > native African </td><td colspan=1 rowspan=1 > 48% </td></tr>
<tr> <td colspan=1 rowspan=1 > Europe </td><td colspan=1 rowspan=1 > 50% </td></tr>
<tr> <td colspan=1 rowspan=1 > Native Brazilian </td><td colspan=1 rowspan=1 > 1.6% </td></tr>
</table>
Question:
What is the biological and ancestral history of Afro-Brazilian people?
Answer:
Afro-Brazilians's mitochondrial DNA, that comes from maternal line, 85% of them come from Africa and 2.5% come from Europe.