Which discovery did not contribute to cell theory

The right answer is All cells require ATP for energy.

Cell theory is the central and principal theory of cell biology and the most recognized foundation of biology in general. The 3 basic principles of the theory are:

* Living organisms are composed by 1 or more cells.

* The cell is elementary of life.

* Every cell comes from another cell, by biogenesis.

The common points of the cells are:

* Every cell has genetic information in the form of DNA which by various processes is expressed in other forms (RNA, proteins, ribosomes ...) that influence its functioning. This causes among other things the phenomenon of cellular differentiation.

* All cells can divide (see mitosis).

* Cells acquire and use energy through cellular metabolism (photosynthesis, glycolysis, respiration).

* Cells use mechanical forces to cohere, maintain, and transform tissues when they associate.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects