CD28 on the T cell and CD80/86 (B7) on the APC provided the costimulatory signal required for T-cell activation.

TLS Online TPP Program

#Id: 6063

#Unit 10. Ecological Principles

The areas of the lake or pond bottom that are not part of the littoral zone are referred to as the benthic zone. This zone contains fine sediment that is free of plant life because light levels are too low to support plant growth. The major trophic levels in the pelagic zone, or open water areas, are phytoplankton, zooplankton, planktivorous (plankton-eating) fish, and piscivorous (fish-eating) fish. The food web in the pelagic zone is connected to the inshore food web because many mobile organisms from the pelagic zone (especially fish) use the inshore areas for shelter and food.

 

TLS Online TPP Program

#Id: 6064

#Unit 10. Ecological Principles

Ocean Zone 

TLS Online TPP Program

#Id: 6065

#Unit 10. Ecological Principles

BIOGEOGRAPHIC CLASSIFICATION OF INDIA

Our country can be conveniently divided into ten major regions, based on the geography, climate and pattern of vegetation seen and the communities of mammals, birds, reptiles, amphibia, insects and other invertebrates that live in them.

TLS Online TPP Program

#Id: 6066

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 6067

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 6068

#Unit 10. Ecological Principles