instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Identify evidence for electroweak unification. The quarks in a particle are confined, meaning individual quarks cannot be directly observed. Are gluons confined as well? Explain. Answer: directly observed
answer:
The quarks in a particle are confined, meaning individual quarks cannot be what?

question:
Passage: To ensure that no more than one sperm fertilizes the egg, once the acrosomal reactions take place at one location of the egg membrane, the egg releases proteins in other locations to prevent other sperm from fusing with the egg. If this mechanism fails, multiple sperm can fuse with the egg, resulting in polyspermy. The resulting embryo is not genetically viable and dies within a few days. Answer: polyspermy
answer:
What is the term for if multiple sperm fuse with an egg?

question:
Passage: Figure 40.5 The cells and cellular components of human blood are shown. Red blood cells deliver oxygen to the cells and remove carbon dioxide. White blood cellsincluding neutrophils, monocytes, lymphocytes, eosinophils, and basophilsare involved in the immune response. Platelets form clots that prevent blood loss after injury. Answer: white blood cell
answer:
Neutrophils and lymphocytes are examples of what type of cell?