1) Describe the relationship between carbon and human activities represented in the model. 2) Explain how the human activities highlighted in your model have affected global climate.

3) Provide examples from your model of conservation of matter through Earth’s spheres.

4)Identify the limitations of your carbon model in accounting for all of Earth’s carbon.

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.

d. the weight of the book