The frog pictured above is larger than 1.5 inches and smaller than 6 inches. use this information, along with the dichotomous key shown and your own observations from the picture, to determine the frog's species name.

a.

bufo marinus

b.

litoria caerulea

c.

bufo boreas

d.

acris crepitans

C. Bufo boreas

Explanation:

frog > 1.5

frog < 6

The frog has Warts on its skin so go to #4.

No triangular mark on its head so go to #5

It has a stripe on back from head to tail so it is a Western Toad (Bufo boreas)

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.