Final answer:
Pollen grains and spores in plants have similarities and differences.
Step-by-step explanation:
Pollen and spores have similarities and differences. Both pollen and spores are reproductive structures of plants, and both are protected by a tough outer wall called sporopollenin. However, pollen grains are male gametophytes that contain the plant's sperm, while spores can develop into either male or female gametophytes.
Learn more about Plant reproduction