TLS Online TPP Program

#Id: 7975

#Unit 10. Ecological Principles

In arid conditions, RWC values of less than 50% cause most plants to die

whereas values closer to 100% indicate plants are less affected by drought stress.

TLS Online TPP Program

#Id: 7976

#Unit 10. Ecological Principles

Water makes life possible, due to its

1. Thermal properties

2. Density

3. Viscosity

4. Solvent for inorganic nutrients

TLS Online TPP Program

#Id: 7977

#Unit 10. Ecological Principles

THERMAL PROPERTIES OF WATER

Pure water becomes a solid below 0°C and becomes a gas above 100°C at sea level.

When water contains dissolved compounds, such as salts, its freezing temperature drops below 0°C.

Dissolved compounds also raise the boiling point of water above 100°C. 

TLS Online TPP Program

#Id: 7978

#Unit 10. Ecological Principles

Thermal stratification

TLS Online TPP Program

#Id: 7979

#Unit 10. Ecological Principles

Water achieves its highest density—that is, its molecules are the most packed together—at 4°C.

TLS Online TPP Program

#Id: 7980

#Unit 10. Ecological Principles

Organisms that are denser than their surrounding water, a variety of adaptations can either reduce an organism’s density or retard its rate of sinking.