Question

Which lists three living units of the human body in order from the simplest to the most complex level of organization?

red blood cell → circulatory system → blood
nervous system → nerves → brain
red blood cell → heart tissue → circulatory system
bone tissue → skeletal system → bone

Answer 1

c

Step-by-step explanation:

Answer 2

The correct answer is option C which is red blood cell → heart tissue → circulatory system.

Step-by-step explanation:

• There are organizational levels from the simplest to the complex as:
• The starting and smallest level is cells. After that, there comes the tissue level. Tissues of different types combined to form the organ level and then comes the system consisting of many levels.
• According to the above organizational level, only option C shows the correct arrangement of organizational levels from the simplest to the complex.