According to the fossil record above, during which era did mammals first appear? A)
Cenozoic
B)
Mesozoic
0
Paleozoic
D)
Modern Day

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

Below, the levels of organization in a multicellular organism are shown from least to most complex. which level of organization can be described as several different types of tissues working together to perform a common task?

Which chemical bond most likely stores the most energy? o a. double carbon-carbon bond o b. single carbon-carbon bond o c. hydrogen-oxygen bond o d. sodium-chlorine bond