Delivering single shocks in succession to stimulate the frog heart .
a. increased the height of the ventricular systole wave
b. resulted in fused tetanus
c. resulted in wave summation
d. did not increase the height of the ventricular systole wave

Eristics do scientists use to distinguish between organisms in different kingdoms

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

The term used to describe a disease-causing microorganism isa. virus.b. infection.c. pathogen.d. microbe.e. bacterium.