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TLS Online TPP Program

#Id: 943

Chemotaxis 
sperms are attracted toward eggs of their species by following a gradient of a chemical secreted by the egg.

#Unit 5. Developmental Biology #Fertilization in Sea urchin #Part B Pointers
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TLS Online TPP Program

#Id: 5829

#Unit 10. Ecological Principles

Ecological succession
TLS Online TPP Program

#Id: 5830

#Unit 10. Ecological Principles

Succession, the gradual and continuous change in species composition and community structure over time.
TLS Online TPP Program

#Id: 5831

#Unit 10. Ecological Principles

Causes Succession

Allogenic factors –  Chemical weathering of rocks or filling in by sand/silt in a pond
Autogenic factors – Autogenic factors include – Immigration, Growth, Reaction, Coactions
TLS Online TPP Program

#Id: 5832

#Unit 10. Ecological Principles
TLS Online TPP Program

#Id: 5833

#Unit 10. Ecological Principles

Step in succession

Nudation 
Migration 
Ecesis 
Aggregation
Competition 
Reaction 
Stabilization
TLS Online TPP Program

#Id: 5834

#Unit 10. Ecological Principles

Primary succession