5. circumnavigated the world twice during his lifetime,
during which he logged descriptions of numerous plants
and animals then unknown to most of mankind and
mapped uncharted waters
o
a. james cook
b. aristotle
o
c. christopher colombus
o
d. charles darwin

answer: 45

explanationyou have to add as well to be it could be

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

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: