Group Living Has Advantages and Disadvantages

When animals live together in groups such as flocks or herds

Disadvantage- Group promote competition for food and increased transmission of parasites and other diseases.

Advantage - Benefits relate to group defense against predators through increased vigilance and through protection in numbers.

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#Unit 11. Evolution and Behavior

Chevalier de Lamarck- Inheritance of acquired characteristics

TLS Online TPP Program

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#Unit 11. Evolution and Behavior

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

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#Unit 11. Evolution and Behavior

Alfred Russel Wallace- Who was collecting specimens in the Malay Archipelago, had independently conceived of natural selection.

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#Unit 11. Evolution and Behavior

Darwin’s evolutionary theory- Evolution as such is the simple proposition that the characteristics of organisms change over time.

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#Unit 11. Evolution and Behavior

Darwin’s evolutionary theory- Common descent

TLS Online TPP Program

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#Unit 11. Evolution and Behavior

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