Which of the following best describes Mendel's idea of segregation? A. Each parent has two copies of each gene and passes on only one copy to its offspring.

B. Male offspring receive traits only from the male parent.

C. Female offspring receive traits only from male parent.

D. Each parent has one copy of each gene. Each offspring receives half of its genes from each parent

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.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air