B. It delivers nutrients and oxygen.
Bacteria is the number 1 answers
Answer:
they get you to youe destination but eiter fast or slow
Explanation:
The top 5 are easy loooooookkkkkk on the map D is de pere
<u>levels of organization </u>
from the smallest units of life to the largest units of the environment :
organelles >>> cells >>> tissues >>> organs >>> organ systems >>> organisms >>> populations >>> communities >>> ecosystems >>> biosphere
