Final answer:
A grain of rice is thousands of times larger than a paramecium.
Step-by-step explanation:
Paramecium is a unicellular organism found in freshwater habitats. It is microscopic in size, measuring around 50-300 micrometers. On the other hand, a grain of rice is significantly larger, measuring approximately 5-10 millimeters in length. Therefore, a grain of rice is indeed thousands of times larger than a paramecium.