A scientist has a fossil that was found in a layer of rock close to the Earth's surface. He believes that the fossil is around 12,000 years old.
Which method would best allow the scientist to confirm the actual age of the fossil?

Finding another fossil in a deeper layer

Finding another fossil in the same layer

using carbon/nitrogen absolute dating

using potassium/argon absolute dating

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.

you click your profile picture in the top right corner and it says edit profile.