1. What’s happening to this rabbit?

2. Rabbit Decomposition
Is this decomposition?
No – the ants are scavengers!

4. * recycle materials in the environment.
Decomposers (Saprophytes) fungi, and bacteria which live on dead matter.
* recycle materials in the environment.
Examples: mushrooms, mold, and bacteria of decay.

5. Decomposers
Organic wastes and dead organisms are eventually broken down to simpler substances by decomposers.

6. * Through this action, chemical substances are returned to the environment where they can be used by other living organisms.

7. Thus, the same materials can be reused by different living organisms.
Material Cycles
In a self-sustaining ecosystem, material must be cycled among the organisms and the abiotic environment.
Thus, the same materials can be reused by different living organisms.

8. Oxygen Water Glucose Carbon Dioxide
Use the words below to construct the equations for photosynthesis and cellular respiration
Oxygen
Water
Glucose
Carbon Dioxide
Photosynthesis: Water + Carbon Dioxide Glucose + Oxygen
Cellular Respiration: Glucose + Oxygen Carbon Dioxide + Water

9. Carbon-Hydrogen-Oxygen Cycle
involves the processes of respiration and photosynthesis.

11. 2 1 3 4 5

12. 4? 3? 5? 1? 2? ?

13. Nitrogen Cycle
The nitrogen cycle “recycles” the nitrogen necessary for the production of proteins, essential to all living things.

14. soil bacteria break down and convert nitrogenous wastes and the remains of dead organisms into materials usable by autotrophs.

15.  Plants use nitrates for protein synthesis.
 Animals which eat plants convert the plant protein into animal protein.

16. Denitrifying bacteria
The Nitrogen Cycle
Denitrifying bacteria
Nitrogen-fixing bacteria
Nitrifying bacteria
Decomposers

17. Legumes

18. Nodules of Nitrogen- fixing Bacteria

19. Nitrogen‑fixing bacteria within the nodules (roots) of legumes

20. 1 2 3 4

21. The Nitrogen Cycle 5 6 1 2 3 4

22. The Plant Toilet

23. Venus Flytrap

24. Pitcher
Plant