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.

Nextend of semester testsubmit testreader toolsinto-samosquitoes in tropical regions can carry and transmit the malaria parasite to humans. the mosquitoes used to be killed in these regions by sprayingthem with the insecticide ddt. the mosquitoes that were earlier sensitive to ddt are now not killed by ddt and grow and multiply even in the presenceof ddt. how can you explain this phenomenon? oa.all of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, whichevolved into a ddt resistant population.b.some of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, whichwould have been selected by nature,oc.all of the mosquitoes must have slowly increased their tolerance level to ddt and ultimately would have become completely resistantto ddtresetnextnext