Category 4&5 STAAR Review

Roots

Petals

Stems

Shoots

O2+ H2O → C6H12O6 + CO2

CO2+ Light → C6H12O6 + O2

CO2+ H2O+ light → C6H12O6 + O2

organ system, cell, organ, tissue, organism

molecule, cell, organ, tissue, organ system, organism

cell, tissue, organelle, organ system, organism

atom, molecule, cell, tissue, organ, organ system, organism

keep everything exactly the same.

usually operate by positive feedback systems.

act to keep the internal environmental conditions outside the normal range

is the ability to maintain a relatively stable internal environment

3

7

70

40

Lichens → Shrubs → Grasses → Trees

Lichens → tree → shrubs→Grasses

Grasses → Lichens → Shrubs → Trees

Lichens → Grasses → Shrubs → Trees