Some fishing boats now use streamers to reduce bird bycatch. What are the pros and cons of this method? A. It is cost-effective, but it rarely protects wildlife.

B. Less bait is lost, but they have not been adopted for use in all countries.

C. They add value to the boat, but most boats can not afford to add them.

D. They increase the fishing haul, but there is a great amount of effort needed to deploy them.

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.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

answer; i believe the answer is hydraulic action;