A scientist studies corresponding genes in two species. Which data would be most useful for determining the time when the split from the common ancestor occurred?
A. mutation rate and the number of mutations in each sequence
B. mutation rate and the number of nucleotides in each sequence
C. mutation rate and the number of nucleotides that differ between the two sequences
D. the number of repeated nucleotides and their specific locations in the two sequences

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

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.