Which of the following would be considered a source of error in an experiment? a. the measurement was recorded in the wrong place in the data table. b. half of a liquid sample was spilled when it was poured from the graduated cylinder into the beaker. c. the collected data did not to answer the research question. d. the mice in the experimental group did not always drink the orange juice that they were given.

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.

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

-privacy of genetically tested people

- potential side effects

-long term effects

is this for the e2020 class

a. by using fur or clothes to trap heat energy near the body