To take measure in the upper troposphere, what piece of equipment would a scientist use? - weather balloon - underwater sonar - x-ray monitor - ice core bore

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

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.