! dinner's cooking. soon we'll be eating some chicken and dumplings. our digestive system will get to work on the food we eat. the food is moved through our digestive system with the of what other body system? a) skeletal system b) muscular system c) response system d) circulatory system

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

When analyzing tree rings, what do scientists assume a thin ring indicates?