THEORIES OF EVOLUTION

This theory stated that organisms can reshape or alter their traits depending on the

importance of those traits to the organisms. Lamarck believed that giraffes before having

short necks, but because of the need to survive and to reach tall trees for food. they kept

stretching their necks until these became longer and able to reach taller trees.

• Theory of Use and Disuse

• Theory of Need

• Theory of Acquired Traits

• Theory of Natural Selection

If a giraffe was successful in acquiring the trait of having a long neck, then the trait would

be passed on to its offspring.

• Theory of Use and Disuse

• Theory of Need

• Theory of Acquired Traits

• Theory of Natural Selection

The _____ states that organisms change over generations in response to their

environment at the same time evolved because they must. Their ability to survive helped

them develop characteristics necessary for them to adapt in each environment.

• Theory of Use and Disuse

• Theory of Need

• Theory of Acquired Traits

• Theory of Natural Selection

He was the first to try to explain how new species evolve.

• Darwin

• Lamarck

• Cuvier

• Aristotle

He proposed an entirely different mechanism to account for the evolution of species.

• Darwin

• Lamarck

• Hutton

• Lyell

Giraffe species originally had varying neck lengths, but ___ favored the survival of

giraffes with longer necks that can feed on taller trees that were available.

• Theory of Use and Disuse

• Theory of Need

• Theory of Acquired Traits

• Theory of Natural Selection

It is also called the "survival of the fittest."

It is the change of species through time in one or more inherited traits found in a population of

individuals.

He proposed an entirely different mechanism to account for the evolution of species.

(Note: His complete name)

It refers to the ability of organisms to adjust and thrive in the given environment.