When dna replicates select one: a. transcription factors determine where to begin dna replication. b. the original dna unwinds, and multiple copies of a region are transcribed before the dna closes back up. c. the original dna is not affected and a new double-stranded dna is made from two new strands of dna. d. a cell that was diploid (2n) will now be tetraploid (4n). e. one strand of the original dna ends up in each of the new dna molecules?

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.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.