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Expression of IdeasEasyIntroducing a person

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - Nettie Stevens (1861–1912) was an American geneticist. - In 1905 she showed that the sex of an organism is determined by its chromosomes. - She worked with mealworms, whose male cells carried one small chromosome. - Her finding was confirmed by later researchers.

The student wants to introduce Stevens to readers unfamiliar with her. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Nettie Stevens (1861–1912), an American geneticist, showed in 1905 through her work on mealworms that an organism's sex is determined by its chromosomes.Correct
  2. B. Stevens was born in 1861.
  3. C. Male mealworm cells carry one small chromosome.
  4. D. Later researchers confirmed a finding.

Answer: A. Nettie Stevens (1861–1912), an American geneticist, showed in 1905 through her work on mealworms that an organism's sex is determined by its chromosomes.

Who she was and what she showed.

Why the other answers are wrong

B. Stevens was born in 1861.
A date only.
C. Male mealworm cells carry one small chromosome.
A detail without the person.
D. Later researchers confirmed a finding.
Vague and without the person.

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