From june to september 1988, 51 different wildfires started in yellowstone park. by the end of the summer, approximately 794,000 acres of the park were affected, which included about 24 percent of the whitebark pine forest population, many lodgepole pine stands, and a variety of other plants and animals. which type of change was seen in the ecosystems that were affected by the 1988 fires in yellowstone park?
primary succession
secondary succession
a climax community
species extinction

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.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.