Answer:
Penetración de luz, p. Ej. el plancton crece mejor en las capas superiores de agua debido a la mayor intensidad de luz.
Las corrientes transportan organismos. ...
La acción de las olas mueve y daña a los organismos.
El contenido de sal hace que los organismos se adapten al agua dulce o salada. ...
La concentración de oxígeno es menor.
Explanation:
espero que haya ayudado
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 RNA (ribonucleic acid) and the associated proteins forms the ribosomes. These ribosomes are the site of protein synthesis in a cell. Inside the stained cell nucleus, the nucleolus part of the cell can be seen. The nucleolus is the part where the all the ribosomes of the cell are assembled.
Hence, the answer is 'nucleolus'.