BiologyOct11th2006 - from placental animals. 3. Homologous...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Dustin 10/11/2006 Biology Block C 1. Older fossils are generally deeper than younger fossils because over time the rock strata layers on top of older ones. 2. Australia has such few placental animals because Australia’s diverse marsupial species evolved from marsupial ancestors on an island continent that was isolated
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: from placental animals. 3. Homologous structures: structures in species sharing common ancestor 4. The greater the number of differences in DNA and protein sequences between species, the less likely they share as close a common ancestry....
View Full Document

This note was uploaded on 09/21/2011 for the course BIOG 1110 taught by Professor Randywayne during the Spring '09 term at Cornell.

Ask a homework question - tutors are online