1. WILDLIFE BIOLOGY & ECOLOGY
Chapter 5

2. OBJECTIVES Explain important life processes of living organisms
Describe the life span of living organisms
Explain the role of heredity and genetics
Discuss the importance of ecosystems

3. Life Processes Growth and Repair Food Circulation Respiration
Secretion
Sensation
Movement
Reproduction

4. Growth and Repair

5. Food

6. Circulation

7. Respiration

8. Secretion

9. Sensation

10. Movement

11. Reproduction

12. Lifespan Beginning – birth, natality
Growth and Development – cells being produced faster than they are dying
Maturity – full grown; cells being produced as fast as they die
Decline – aging sets in; cells dying faster than being produced
Death - mortality

13. Genetics and Heredity
Genetics – study of how traits (characteristics) are transmitted from parents to offspring
Heredity – the traits/characteristics that are acquired from parents
Gene – a segment of DNA that has instructions for producing one trait/characteristic
Chromosome – a long, but microscopic thread of protein and DNA; a chain of genes; humans have 23 pairs of chromosomes
Mutation – a change or mistake in the DNA
Natural Selection – natural conditions favor organisms with desirable survival genes

14. Genetics

15. Heredity

16. Genes and Chromosomes

17. Mutations

18. Natural Selection

19. Levels of Organization in F&W
Species – a group of like organisms
Population – all the members of one species in a given area at a given time
Community – all the members of all the species in a given area at a given time
Ecosystem – the living community plus the non- living components in a defined area

20. Species

21. Population

22. Community

23. Ecosystem

24. Ecological Considerations
Biotic factor – factor resulting from a living organism (s) in the ecosystem
Abiotic factor – factor resulting from non-living component of ecosystem
Niche – the special way an organism lives in a community; the role it serves
Food chain – the sequence in a community in which wildlife get their food
Food web – a series of interconnected food chains

25. Biotic Factors

26. Abiotic Factors

27. Niche

28. Food Chain

29. Food Web