Ageologist finds a large rock containing a fern fossil. this kind of fern grew on land in hot, moist climates. what does this tell the geologist about the area at the time the rock was formed? a. the area was hot and tropical. b. the area was snowy and cold. c. the area was muddy and wet. d. the area was covered by the ocean

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 shift of a vehicle's weight around its center of gravity is known as

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has