How does natural selection lead to an increase or decreased in heritable traits over time in a population?

What effect does plate tectonics have an organic evolution

Which of these best describes wde by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above