Natural Selection Lamarck and Darwin

Who proposed the idea that animals improve themselves during their lifetimes and pass these changes to their offspring?

• Jean-Baptiste Lamarck

• Alfred Russel Wallace

• Gregor Mendel

• Charles Darwin

According to Lamarck's theory, what would happen if two animals used their right limbs more than their left limbs?

• Their offspring would have no change in limb development

• Their offspring would have underdeveloped right limbs

• Their offspring would have overdeveloped left limbs

• Their offspring would have overdeveloped right limbs

What key concept did Charles Darwin introduce in his theory of evolution?

• Inheritance of acquired characteristics

• Natural selection

• Punctuated equilibrium

• Genetic drift

What does 'fitness' mean in the context of Darwin's theory?

• The speed of an individual

• The ability to survive and reproduce

• The intelligence of an individual

• The physical strength of an individual

How did Darwin's idea of trait inheritance differ from Lamarck's?

• Darwin believed traits were modified by the life of the parent

• Darwin believed traits were passed on without modification

• Darwin believed traits were not inherited at all

• Darwin believed traits were inherited only from the mother

What did Darwin observe about variation in populations?

• Variation is rare and insignificant

• Variation is created by the environment

• There is no variation in any given characteristic

• Variation already exists in any given characteristic

What would natural selection favor in the case of giraffes?

• Giraffes with shorter necks

• Giraffes with longer necks

• Giraffes with thicker necks

• Giraffes with the same neck length

Who wrote a letter to Darwin saying he had thought of the same idea of natural selection?

• Thomas Huxley

• Alfred Russel Wallace

• Gregor Mendel

• Jean-Baptiste Lamarck