Some general evolutionary change trends in animals include:
a. lower surface area to volume ratio, radial symmetry, mutualism with photosynthetic organisms.
b. larger body size, bilateral symmetry, and growth by continuous addition to skeletal elements.
c. bilateral symmetry, chitinous cell walls, ability to digest cellulose.
d. radial symmetry, motility, filter feeding.
e. greater surface area to volume ratio, radial symmetry, diffusion to move nutrients in the body.
Ans: b. larger body size, bilateral symmetry, and growth by continuous addition to skeletal elements.
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