According to an American Cancer Society's annual report published in December 2009, the U. S. cancer death rate continues to decline, as it has since the 1990s. This may be attributed to all BUT ONE of these factors.

0)

A)

early screening

B)

fewer people smoke

C)

genetic engineering

D)

healthier diet and less obesity

C

Explanation:

The reduced rate of cancer deaths in the United States may be attributed to all of the factors except genetic engineering. Early detection and a healthier lifestyle are the main contributors to the reduced incidence of cancer as well as the reduce death rate.

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.

your answer should be c) enjoy!