© 2014 Pearson Education, Inc. 1. 4.5 bya3.51.52.5500 mya 1.8 bya1.5 bya1.3 bya1.2 bya 20 m 25 m (a)A 1.8-billion- year-old fossil eukaryote (b)Tappania,
Figure 20.UN01 A B C D (a) D C B A (c) B D C A (b) Which of these trees is not like the others…..
Protist #2 Life cycles Algae Dichotomous key. Human life Cycle.
