Which two organ systems help provide materials that are necessary for cellular respiration? * 1 point Respiratory and Digestive Respiratory and Circulatory Digestive and Circulatory Respiratory and Excretory

the answer for this question would be d. glaciers

the answer is cell division : )

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.