Identifying Parts of an Ecosystem Warm-Up
Match each term to the appropriate description.
ecosystem
allorca whales, fish, and seaweed living in
one area
population
allorca whales, fish, seaweed, islands, and
the Pacific Ocean
community
a group of orca whales living along the Gulf
of Alaska
organism
allorca whales in the world
species
a single orca whale

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.

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the answer would be d : p