We can infer from the fourth paragraph that______.
A. enhancement evolution is technically impossible
B. parents have the final say on children"s genome change
C. parents and children usually have different designs for the future
D. enhancement evolution may cause moral problems
The word "vulnerable"(Line 6, Paragraph 2)most probably means______.
A. entirely wiped out
B. on the alert
C. easy to be attacked
D. getting immune
Which of the following can be the advantage of enhancement evolution？
A. Bringing in delicate changes to genes.
B. Replacing natural selection.
Changing human species entirely.
D. Enhancing human immunity.
It can be inferred from the first paragraph that______.
A. Louis Brandeis is reconsidering his view on evolution
B. the course of evolution may speed up owing to human intervention
C. human beings may skip over any natural selection in future
D. the aim of biotechnology is to create a whole new species
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