Question

fill in the blank question
microvilli are extensions of the plasma membrane that are
and more numerous than cilia.
need help? review these concept resources.

Explanation:

Microvilli are small, finger - like extensions of the plasma membrane. Compared to cilia, microvilli are shorter in length. This is a basic concept in cell biology (a subfield of Biology, which is part of Natural Science). So the word that fits in the blank is "shorter".

Answer:

shorter