How is an inference related to observation

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?