Define each of the following in one complete sentence.
Carbohydrates are important for sperm recognition of the egg surface.
Briefly describe an example and an experiment to test the role of glycoproteins during sperm activation. Define cell potency, cell fate, cell determination and cell differentiation. The nuclear transplantation success rate of Briggs and King was limited to nuclei from donors younger than tail bud tadpoles. In contrast Gurdon even had limited success with transplanting nuclei from differentiated adult tissues. In many organisms oogenesis utilizes somatic accessory cells, such as follicle cells.