There are three different modes of cell specification: 

1. Autonomous

2. Conditional

3. Syncytial

TLS Online TPP Program

#Id: 2158

#Unit 9. Diversity of Life Forms

TLS Online TPP Program

#Id: 2159

#Unit 9. Diversity of Life Forms

Animal Kingdom is characterized by multicellular, eukaryotic organisms. The cells lack cell walls.

TLS Online TPP Program

#Id: 2160

#Unit 9. Diversity of Life Forms

They ingest and digest food (holozoic), hence they are heterotrophic. Higher forms show elaborate sensory and neuromotor systems. Majority of them are motile.

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.