Which statement best contrasts the respiratory and circulatory systems?

a: the respiratory system moves oxygen, while the circulatory system moves blood.
b: the respiratory system includes the heart, while the circulatory system includes veins.
c: the respiratory system rids the body of waste, while the circulatory system pumps blood.
d: the respiratory system provides nutrients, while the circulatory system controls blood flow.

A. The respiratory system moves oxygen, while the circulatory system moves blood

Explanation:

The respiratory system includes all the organs necessary for gaseous exchange. They include lungs, trachea, etc. They help in the movement of oxygen into the body and the removal of CO2 out of the body.

The circulatory system AKA the transport system, include the heart , vessels as they pump nutrients and oxygen to all parts of the human body. Removal of CO2 from organs and is the job of the circulatory system including urea, etc .

eukarya because is is like alche and b is bacteria and d is animals

explanation:

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.