In which phrase will cross-over occur?
b. prophase i
c. metaphase i
d. metaphase ii
i got mitosis wrong in penn foster high

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

If assuming tasting ptc as a simple gene trait,what other genotype would you select to put in this missing genotype box that could result in this phenotype

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?