Plants and animals have highly organized systems. which of these shows the level of complexity, from simplest to most complex?

a. organism - organs - organ systems
b. organs - organ systems - organism
c. organ systems - organism - organs
d. organs - organism - organ systems

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.

i do not know and i have a 100 in this class

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects