Theories to explain origin of life

Special Creation

Panspermia/ Cosmozoic theory/ Interplanetary theory

Spontaneous Generation

TLS Online TPP Program

#Id: 7968

#Unit 10. Ecological Principles

  Hydrologic cycle

      

TLS Online TPP Program

#Id: 7969

#Unit 10. Ecological Principles

Biogeochemical cycles can be divided into two broad types:

Local cycles, which involve elements with no atmospheric mechanism for long-distance transfer. Ex- The phosphorus cycle

Global cycles, which involve an interchange between the atmosphere and the ecosystem. Ex- The carbon, Nitrogen, Sulfur, and Water

TLS Online TPP Program

#Id: 7970

#Unit 10. Ecological Principles

The water content of plant cells depends on osmosis and turgor pressure. 

TLS Online TPP Program

#Id: 7971

#Unit 10. Ecological Principles

Osmosis is the movement of water across membranes to balance solute concentrations. Water diffuses from a solution that is hypotonic into a solution that is hypertonic

Turgor pressure is the hydrostatic pressure that increases as water enters plant cells.

TLS Online TPP Program

#Id: 7972

#Unit 10. Ecological Principles

Animal cells lack cell walls and do not experience turgor pressure.

TLS Online TPP Program

#Id: 7973

#Unit 10. Ecological Principles

Plant cell walls restrict the extent to which cells can expand, hence the pressure on the cell wall increases as more water enters the cell.