The correct answer to this question is this one: they lacked oxygen. The earliest organisms were completely heterotrophic in nature because of the reason that they lacked oxygen. <span>A heterotroph is an organism that cannot fix carbon and uses organic carbon for growth. </span>
The answer is d. atmosphere < leaves < roots < soil
These organelles are like the organs in a human and they help the cell stay alive. Each organelle has it's own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA. Eukaryotes also have a golgi apparatus that packages and distributes proteins. Hope this helps!
The model of the structures of the cell and and their functions is given in the image attached.
<h3>What are the cell structure and their functions?</h3>
Some explanation on structure of cells is given below:
The nucleus:
This is known to be the key or major organelle that tends to sustain or hold the genetic information that is needed for reproduction and cell growth as well as development.
Note that all cell is known to be made up of one nucleus and also a kind of membrane-bound organelles that can be seen in the cytoplasm.
Mitochondria:
This is known to be a double membrane-bound organelle that is known to function by acting as the site for the energy transactions and it is made for the survival of all cell.
Therefore, The model of the structures of the cell and and their functions is given in the image attached.
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