Some complex multicellular organisms are organized at four levels to increase efficiency. What is the correct order of organizat
ion, from the simplest to the most complex? a. organ, tissue, cell, organ system
b. cell, organ, organ system, tissue
c. tissue, cell, organ system, organ
d. cell, tissue, organ, organ system
<span>The answer is letter D. The simplest to most
complex life organization is: cell, tissue, organ, organ system. Multicellular
organisms are composed of the building blocks of life called cells. When cells
are grouped together they form tissues that perform specific functions in an
organism. Further in the line, when tissues are grouped together they form
organs; organs are responsible in performing bodily functions in organisms. The
heart, lungs, and brain are the most important organs in the human body. When
organs work in an interconnected way they are called organ systems. </span>
At first, it was thought that the Earth's atmosphere consisted of hydrogen compounds—methane, ammonia and water vapour—and that life began under such reducing conditions, which are conducive to the formation of organic molecules
<span>Answer is D. Nuclear power does not produce smoke or carbon dioxide.Nuclear power plants do not produce smoke or carbon dioxide while operating unlike fossil fueled power plants so it’s not contributing to the greenhouse effect but the process for refining uranium ore and creating reactor fuel requires a lot of energy.<span> </span></span>
