Ions, low-MW precursors of cellular macromolecules, products of intermediary metabolism, & small intracellular signaling molecules can pass from cell to cell through gap junctions.

TLS Online TPP Program

#Id: 2161

#Unit 9. Diversity of Life Forms

BASIS OF CLASSIFICATION

Arrangement of cells, body symmetry, nature of coelom, diploblastic or triploblastic nature of the body wall, segmentation, presence or absence of notochord.

TLS Online TPP Program

#Id: 7805

#Unit 10. Ecological Principles

Microclimate – The actual climatic conditions that organisms live in vary considerably within one climate.

Example of Microclimate is Shade

where temperatures under vegetation in deserts can be 10–20°C lower than sun temperatures.

TLS Online TPP Program

#Id: 7806

#Unit 10. Ecological Principles

TEMPORAL ENVIRONMENTAL VARIATION describes how environmental conditions change over time.

TLS Online TPP Program

#Id: 7807

#Unit 10. Ecological Principles

SPATIAL ENVIRONMENTAL VARIATION

Environmental variation also occurs from place to place due to large-scale variation in climate, topography, and soil type

TLS Online TPP Program

#Id: 7808

#Unit 10. Ecological Principles

                                                                                              

TLS Online TPP Program

#Id: 7809

#Unit 10. Ecological Principles

Abiotic factors determine the fundamental niches of organisms.

The actual range of an organism in nature is termed the realized niche.