Sex linked recessive inheritance: hemophilia disease is a sex-linked disorder. Jason is heterozygous and Rosy is healthy, even though her mother suffers from the disease. They want to start a family, but also want to know the risk of passing the disease on to their children. Work out a Punnett square to answer the probability question. What is the probability that Rosy and Jason will have a healthy child?

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

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade