Polyp animals that form coral reefs have many unique adaptations for survival. one polyp feature that is detrimental rather than beneficial is
a)
secretions that produce a hard protective skeleton.
b)
the inability to leave the reef and swim after prey.
c)
stinging cells that kill prey and discourage predators.
d)
symbiotic relationships with algae that photosynthesize and feed them.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.