Sickle cell anemia is a genetic condition that occurs because of a single base mutation in the DNA gene for hemoglobin. How is this mutation expressed in humans? The protein coded by the DNA has a different amino acid sequence

The hormones in the blood are changed by increased differences in genes

The chromosome carrying this gene changes shape during cell reproduction

The carbohydrate coded by the DNA has a different structure

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.

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse

answer; hydrologic cycle;