Evolutionary relationships amongst species are reflected in their:
Correct answer: A. DNA and Proteins
- A. DNA and Proteins
- B. RNA and Proteins
- C. DNA and Genes
- D. DNA and RNA
Explanation
The extent to which proteins and DNA are conserved between organisms gives us clues about the amount of evolutionary time that has passed since the two organisms diverged from one another.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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Theory of Lamarck was based on:
Inheritance of acquired characteristics is based on:
The following observations refer to evolution: I. Inherited variations that are 'favored' in particular environments are passed on. II. There is a struggle for existence. III. In time, 'favored' inherited variations may accumulate causing gradual changes in the organism. IV. Although populations tend to overproduce, they remain more or less constant in numbers from generation to generation. In what sequence should the statements be placed to support Darwin's theory of evolution?