How does the spindle move sister chromatids during anaphase? a. sister chromatids are pushed together, away from spindle poles. b. sister chromatids are pulled toward the spindle poles. c. spindle microtubules engage in a tug-of-war that centers chromosomes at the midline. d. none of the above. spindles do not use mechanical forces?

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

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