cell determination as an issue in the study of embryonic development
scientific dogma as a factor in the recent debate over the value of molecular biology
4. According to the passage, when biologists believed that the cells in the early embryo were undetermined, they made which of the following mistakes?
They did not attempt to replicate the original experiment of separating an embryo into two parts.
They did not realize that there was a connection between the issue of cell determination and the outcome of the separation experiment.
They assumed that the results of experiments on embryos did not depend on the particular animal species used for such experiments.
They assumed that it was crucial to perform the separation experiment at an early stage in the embryos life.
They assumed that different ways of separating an embryo into two parts would be equivalent as far as the fate of the two parts was concerned.
5. It can be inferred from the passage that the initial production of histones after an egg is fertilized takes place
in the cytoplasm
in the maternal genes
throughout the protoplasm
in the beaded portions of the DNA strings
in certain sections of the cell nucleus
【SAT文章阅读模拟题之embryo cells】相关文章:
★ SAT阅读练习题:Reading Comprehension Test 13
★ SAT官方阅读习题Sentence Completion
最新
2016-03-02
2016-03-02
2016-03-02
2016-03-02
2016-03-02
2016-03-02