1. BIO
Evolution is in progress. 3.As we survey the living members of the plant kingdom there is a tendency to think in terms of primitive and advanced groups and that one group represents the ancestor of another: a moss evolved into a fern which evolved into a conifer and so on until we reach the flowering plants. ... One cell in the sporangium grows and then goes through meiosis, producing four haploid megaspores. This megaspore continues to grow, and its nucleus divides by mitosis three times, resulting in one large cell with eight haploid nuclei. ... Seeds that are randomly positioned when plante...
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- Grade Level: High School