Essential oils have well-known insect repellent properties.

Essential oils can be extracted from plants by steam distillation and are important commercially in flavoring foods and making perfumes

TLS Online TPP Program

#Id: 9547

#XL - T Zoology

TLS Online TPP Program

#Id: 9548

#XL - T Zoology

Neo-Lamarckism - August Weismann

cut off the tails of mice for many generations and showed that this mutilation had no effect on the tail length of their descendants.

TLS Online TPP Program

#Id: 9549

#XL - T Zoology

Darwin’s evolutionary theory 

Evolution as such is the simple proposition that the characteristics of organisms change over time. 

TLS Online TPP Program

#Id: 9550

#XL - T Zoology

Postulate of Darwin

Geometric increase 

Limited food & Space

Struggle for existence 

Variation 

 Natural selection

Inheritance of useful characters

Speciation

TLS Online TPP Program

#Id: 9551

#XL - T Zoology

Darwin’s evolutionary theory - Common descent

TLS Online TPP Program

#Id: 9552

#XL - T Zoology

Gradualism is Darwin’s proposition that the differences between even radically different organisms have evolved by small steps through intermediate forms, not by leaps