What discovery supports the hypothesis that RNA was the genetic material in the earliest organisms?
a. Ribozymes are RNA that can self-replicate,
b. DNA does not require enzymes to replicate.
c. RNA stores genetic information on ribozymes.
d. Chains of RNA will form lipid membranes.

the backbone of the dna and rna compound is sugar phosphate.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

yes we can.   a lady urinates from her urethra.