Which of the following organs is not part of the excretory system?
a. skin
c. liver
b. kidney
d. heart

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population

In the practice of science, this type of reasoning is used to develop explanations.