4. How is the sand worm adapted to carrying out ingestion and digestion? 5. State and explain at least 5 ways in which sand worm structure leads to function that makes them well adapted to their environment. 6. What hypothetical adaptation can you think of that could make them more successful? Explain.

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.