TY  - SER
AU  - Ramsey, William L. 
TI  - Holt life science
SN  - 003017936X
U1  - 570 22
PY  - 1978///
CY  - New York
PB  - Holt, Rinehart and Winston, Publishers
KW  - Biology
KW  - Biology teaching and studying
KW  - Life sciences
N1  - Contents 
Unit One. The Living world 
1. The Biosphere  
2. Living Matter
3. The Variety of Life 


Unit Two. Life Support Processes I
4. Movement of Materials 
5. Food - Marketing and Digestion
6. Energy Release and Transport
7. Waste Regulation and Excretion 

Unit Three. Life Support Processes II
8. Support and Movement  
9. Control Systems
10. Reproduction
11. Genetics 

Unit Four. Ecology 
12. Energy Pathways 
13. Community Relationships
14. The Biomes of North American 
15. The Quality of Quality of Our Environment
; Includes Index : p. 493 - 504
ER  -