The mediastinum separates: a. The thoracic cavity into right and left parts.

b. The thoracic cavity from the abdominal cavity.
c. The thoracic cavity from the pelvic cavity.
d. The abdominal cavity from the pelvic cavity.
e. The abdominal cavity into right and left parts.

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

Whats one way that rocks do not follow the typical rock cycle pathway?

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.