Question

I. _______________ have scientists worked with human embryonic stem cells? This is the first time.

II. _______________ is likely to profit from human embryonic stem cells? Patients with Alzheimer and diabetes, for example.

III. ______________ cells could be replaced by human embryonic stem cells? Those of the blood, skin, heart, and others.

IV. ______________ do humans need to start reproducing themselves? Among other things, a high-quality donor egg, a bit of skin and the womb of a surrogate mother.

Marque a alternativa que preenche as frases corretamente:

A. How often / Who / Which / What.

B. Where / Whose / /How old / What.

C. What / Which / How many / Who.

D. When / Whom / What / How often.

E. How often / What / How many / When.​

Answer 1

Resposta:

D

Explicação:

da pra saber pelo tempo