Assume sexual reproduction occurs. what is the number of chromosomes in the zygote if the parent's reproductive cells or gametes contain 12 chromosomes each?

What does gradualism and punctuated equilibrium have in common

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

If animal agriculture was eliminated, how much grain would become available for human consumption?