Why are priapulidworms
(like the cactus worm) more complex than annelidworms?

priaupulidworms are more complex than annelidworms because the live in aquatic habitats and have distinct habits to survive in the habitat compare to annelidworms that reside in dry to moist habitats.

Explanation:

Priaupulidworms are small wormlike animals found mostly in sea. They have a swollen mouthpart called proboscis e.g cactus worm.

Annelidworms are segmented worm that reside in dry or moist habitat. They are biallateraly symmetrical and tripoblastic.

its like this, "if i give a plant an unlimited amount of sunlight,then the plant will grow to its largest possible size."

hope it let me know if it does or doesn't =^-^=

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.