How can the deliberate contamination of food be prevented​

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

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form