THE GROUPS AND ANCESTRY OF ORGANISMS 



PROTOPLASMIC 



99 



ACELLULAR 



a blue-green alga, 

 Cyanophyta 



I 



a bacterium, 

 Schizophyta 



a green flagellate, a slime mold, 



Mastigophora Myxomycophyta 



CELLULAR 



TISSUE 



a sponge, 

 Porifera 



a green alga, 

 Chlorophyta 



a liverwort, 

 Bryophyta 



a jellyfish, 

 Coelenterata 



ORGAN SYSTEM 



root 



a flowering plant, 

 Tracheophyta 



a newt or waterdog, 

 Class Amphibia, 

 Phylum Chordato 



Figure 7.1 Grade of organism organization as exemplified by certoin creatures possessing the 

 various structural levels of complexity. The flower in the flowering plant is a group of organs, on 

 organ system. 



