<span>Sponges have biradial symmetry, canal system, skeletal system, osculum as an outlet of water.
Moreover, they have pores in the body to let water come in. In addition,they also have choanocytes,gemmules etc and they are diploblastic. Whereas these functions are not found in protists.</span>
I believe the answer is C
Answer:
precession
Explanation:
The orbit isn’t the simple ellipse, rather it is one that moves a little, loop after loop. This motion is called precession, and you may have heard about it when astronomers talk about the precession of the orbit of Mercury
