Arrange the following from smallest to largest level of organization: organ system tissue, cell, organ, atom.

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

What is a group of organisms that are closely related and share similar characteristics

Which structure in the cardiovascular system connect arteries to veins?