Answer key: New Stem Cell Discovery

Answer Key:  New Stem-Cell Discovery Stirs New Ethical Questions

While Reading Activities: Word Inference

  1. predict  |prəˈdikt| verb say or estimate that (a specified thing) will happen in the future or will be a consequence of something: it is too early to predict a result |
  2. ethics   |ˈeTHiks| pl.noun [ usu. treated as pl. ] moral principles that govern a person’s or group’s behavior: Judeo-Christian ethics.
  3. complex adjective |ˌkämˈplekskəmˈpleksˈkämˌpleks| • not easy to analyze or understand; complicated or intricate: a complex personality | the situation is more complex than it appears.
  4. diabetes |ˌdīəˈbēdēzˌdīəˈbēdis| noun-a disease in which the body’s ability to produce or respond to the hormone insulin is impaired, resulting in abnormal metabolism of carbohydrates and elevated levels of glucose in the blood and urine.
  5. embryo |ˈembrēˌō| noun (pl. embryos)-an unborn or unhatched offspring in the process of development.
  6. grapple |ˈɡrapəl| verb-(grapple with) struggle with or work hard to deal with or overcome (a difficulty or challenge): other towns are still grappling with the problem.
  7. Adherence|ədˈhirəns| noun-attachment or commitment to a person, cause, or belief: a strict adherence to etiquette | he moved to Avignon and won the adherence of the French king
  8. optimistic |ˌäptəˈmistik| adjective-hopeful and confident about the future: the optimistic mood of the sixties | he was optimistic about the deal.
  9. clone |klōn| noun-Biologyan organism or cell, or group of organisms or cells, produced asexually from one ancestor or stock, to which they are genetically identical.
  10. primitive  |ˈprimədiv| adjective-relating to, denoting, or preserving the character of an early stage in the evolutionary or historical development of something: primitive mammals | a name corrupted from primitive German.

Reading Comprehension: Word -Recognition

Dr. Edwards won the Nobel Prize in 2010 for his research, which opened the door to in vitro fertilization. The discovery also made it possible to study the earliest moments of human development. Governments around the world began deliberating over how long research laboratories and fertility clinics should be allowed to let these embryos grow. The so-called 14-day rule came to be embraced not just by scientists in the United States but in other countries as well.

 Grammar Focus: Prepositions

Experts predict, they will learn how to engineer these cells into new kinds of tissues and organs.

In the future, they may develop into far more complex forms.

Such as a beating human heart connected to a rudimentary brain, all created from stem cells.

Adherence to the 14-day rule led to tremendous advances.

Each of those germ layers goes on to produce all the body’s tissues and organs.