100 POINTS
If evolution is going to occur as a result of natural selection, what must be true about the trait that is being studied? *

All forms of the trait have the same impact on survival.
The trait is passed on genetically to the next generation.
The trait is resistant to mutations.
The trait is the same for all organisms.

If evolution is going to occur as a result of natural selection, what must be true about the trait that is being studied?

than The trait is passed on genetically to the next generation.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.