A scientist was studying a tissue sample. Most of the cells that she examined had a certain amount of chromosome material, but there were also some cells with half as much chromosome material as the others. What is the best explanation for what she saw?

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

Which of these statements are true about scientific theories and hypothesis

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?