Why do the fibers change direction on each layer of an osteon?

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

One gene can influence trait(s). one trait can be determined by gene(s).