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?
Correct answer: E. IV, II, I, III
- A. I, II, III, IV
- B. II, I, III, IV
- C. III, I, IV, II
- D. IV, I, II, III
- E. IV, II, I, III
Explanation
Summarizing Darwins' theory in correct sequence: 1. Organisms overproduce but remain constant in number. 2. There is a struggle for existence. 3. Only those traits which survive the best are passed on to the next generation. 4. As a result gradually the traits are passed on to form an organism.
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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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